Nano Machine Character Guide: Full Roster, AniList-Verified

TL;DR: Nano Machine character guide, checked against AniList rather than a fan wiki: Cheon Yeo-woon, the Six Clans throne rivals who outrank him by birth, the Demonic Cult's elders, and the allies who end up training beside him at the Demonic Academy.

Search "Nano Machine characters" and you land on a Fandom wiki, an Anime-Planet cast listing, a TV Tropes character page, and a dedicated OtakusNotes rundown, four separate places to figure out who's who in a series that has run past 324 chapters without this site ever profiling a single named character. The review covers whether Nano Machine is worth reading. The reading guide covers where each arc starts. Neither one tells you who Mu-Yeon Cheon is, or why five different people are all racing Cheon Yeo-woon to the same throne.

This guide answers that specific question, sourced against AniList's character database for the series rather than a fan wiki someone edited years ago. For the verdict on whether the hybrid cultivation-system design works, read the Nano Machine review. For the arc-by-arc breakdown of where to start and how the story is paced, see the Nano Machine reading guide. This page does neither job. It exists to put a verified name and a verified detail next to every face you'll meet in the first hundred chapters.

Key Takeaways

• Cheon Yeo-woon is AniList's sole main-cast entry, credited as the Seventh Prince and the illegitimate son of a servant mother who wasn't from the Six Clans.
• Five throne candidates from the Six Clans are named individually on AniList: Mu-Yeon Cheon, Gyeong-Un Cheon, Won-Ryeo Cheon, Jong-Seom Cheon, and Mu-Geum Cheon.
• Yu-Jong Cheon, the Lord of the Demonic Cult and Cheon Yeo-woon's father, is confirmed as one of the Top Five Strongest Masters in the entire Murim.
• Gyu Mun (AniList: Mun-Gyu) is the confirmed female lead, introduced as part of Cheon Yeo-woon's team at the Demonic Academy.
• The Demonic Cult's elders and guardians, Maeng Seop, Hwa-Myeong Lee, Mu-Hwa Yeon, Soyu Hang, and the Great Guardian Hobeopga, each hold a distinct rank rather than functioning as one interchangeable senior-disciple bloc.
• Every name and detail below traces back to AniList media entry 120980, queried live this session rather than copied from a competitor's wiki.

Overview

Nano Machine opens with Cheon Yeo-woon at the bottom of a hierarchy most casual coverage flattens into "low-status disciple." AniList's character bio is more specific than that: he's the Seventh Prince of the Cheon family, technically eligible for the Demonic Cult's throne, but his mother was a servant rather than a member of any of the Six Clans that actually hold power. That single fact does most of the narrative work in the opening arc.

He has a claim. He has no support behind it. An oath extracted by the Lord's other wives even keeps him from training in martial arts for his first fifteen years, which is why the nanomachine he eventually receives matters so much: it's the only advantage nobody negotiated away from him first.

Once he enters the Demonic Academy, that single fact multiplies into a cast. Five other Cheon-family candidates, each backed by one of the Six Clans, are already ahead of him. A rotating cast of instructors, guardians, and fellow cadets fills in around them. A reader six chapters in and a reader three hundred chapters in are often tracking two different versions of this roster without realizing it, because the series keeps introducing names with titles attached rather than pausing to explain the org chart.

For readers comparing Nano Machine against other manhwa built on this exact setup, from a low-status hunter racing named rivals, manhwa like Nano Machine sorts seven picks by which specific angle hooked you.

Nano Machine Character Guide: Cheon Yeo-woon, the Seventh Prince

Cheon Yeo-woon is the only character AniList bills as series-main, and the bio is worth reading past the one-line summary. He's a member of the Cheon family, born to a servant who worked in the Lord's chamber, and because she wasn't from any of the Six Clans, he's counted as an illegitimate son despite technically holding a right to the throne. AniList is blunt about what that combination means in practice: an extremely low chance of ever claiming it without outside backing.

The detail that separates Nano Machine's opening from a standard weak-to-strong setup is specific. Yeo-woon doesn't train in martial arts at all for his first fifteen years, a restriction AniList attributes directly to an oath tied to the Lord's wives from the Six Clans. In a murim series, that's not a minor inconvenience.

It's a fifteen-year head start handed to every one of his rivals before the story even begins. Only after he enters the Demonic Academy does he start learning technique at all, and only then does the nanomachine's growth-rate advantage start closing a gap that size.

Note: AniList's structured name field lists him as "Yeo-Un Cheon," but the character's own bio text and several supporting-cast bios spell it "Yeo-Woon Cheon." This site's review and reading guide use "Cheon Yeo-woon," the spelling WEBTOON's English release and most fan communities default to. All three point at the same person; this guide uses the site's established spelling throughout.

His mother, Yeon Hwa (Lady Hwa), was the seventh wife of Lord Yu-Jong Cheon. AniList confirms she was poisoned and died while Yeo-woon was still young, which is the event that leaves him without a maternal clan to fall back on in the first place. Ga-Gyeong Jang (Guard Jang) served Lady Hwa until her death and is credited as the parental figure of Yeo-woon's early life, the closest thing to family he has before the Academy gives him a team to work with.

For readers who want to understand exactly what the nanomachine's growth-rate advantage is measuring against, the Nano Machine cultivation guide breaks down the eight-realm ladder Yeo-woon has to climb, and where his pace outstrips the Six Clans candidates who started fifteen years ahead of him.

Clockwise from top left: Cheon Yeo-woon, Gyu Mun, Sang-Hwa Ho, and Maeng Seop. Portraits via AniList.

Nano Machine Character Guide: the Demonic Cult's Six Clans

Most recap coverage treats Yeo-woon's rivals as a faceless mass of "senior disciples." AniList's character list names five of them individually, each tagged to a specific clan and a specific claim on the succession.

Mu-Yeon Cheon is the son of Lord Yu-Jong Cheon through the Dark Clan, and AniList credits him as the candidate deemed most likely to succeed the throne at the point the Demonic Academy arc begins. That makes him the benchmark the story measures Yeo-woon's rise against, not just another name on a list.

Gyeong-Un Cheon represents the Sword Clan and is named as one of the Top 3 candidates most likely to inherit. Won-Ryeo Cheon carries the Sound Clan's backing. Jong-Seom Cheon stands for the Poison Clan. Mu-Geum Cheon is the Spring Clan's candidate. AniList's bios for the last three are brief, single-line entries, which itself is informative: these three are confirmed as real, named contenders, but the site isn't going to invent detail AniList doesn't provide for them.

That's five clans represented by name. A sixth clan exists structurally (the Six Clans as a bloc are referenced repeatedly across the cast's bios) but AniList's character database doesn't currently list a named sixth candidate, so this guide doesn't guess at one.

Top row, left to right: Mu-Yeon Cheon, Gyeong-Un Cheon, Won-Ryeo Cheon. Bottom row: Jong-Seom Cheon, Mu-Geum Cheon. The five Six Clans candidates AniList names individually. Portraits via AniList.

For how another murim series builds its own named rival roster around sect and clan politics, see the

Return of the Blossoming Blade character guide →

Demonic Cult Leadership and Elders

The adults running the Demonic Cult aren't background scenery either, and AniList's bios give several of them enough specificity to separate them from each other.

Yu-Jong Cheon (alt: South Demon Lord) is the Lord of the Demonic Cult and Yeo-woon's father. AniList credits him as one of the Top Five Strongest Masters in the entire Murim, a title he holds as Southern Demon Lord after succeeding a predecessor named Inji Cheon. He's the reason Yeo-woon has a claim at all, and the reason that claim is worth so little without one of the Six Clans standing behind it.

Maeng Seop (alt: Meng Seob, Crazy Blade) is the Right Guardian of the Demonic Cult and, per AniList, Yeo-woon's first teacher once his martial arts training finally begins. His nickname comes from a drunkard-like, unpredictable blade style that AniList describes as part of his actual fighting method, not just a personality quirk.

Hobeopga (alt: Grand Guardian, Great Guardian) holds the title Great Guardian of what AniList names as the Heavenly Demon Divine Cult, and Protector of the Heavenly Demon Order. He's famous across the Murim for a speed and swordwork combination that's reportedly killed hundreds of masters, which earned him a second title: the Dark King.

Note: This guide uses "Demonic Cult," the shorthand this site's review and reading guide already established, throughout. AniList's own character bio for Hobeopga names the fuller organization as the Heavenly Demon Divine Cult, with Heavenly Demon Order recorded as a related title. Same faction, two names depending on which source you're reading.

Hwa-Myeong Lee (alt: Left Guardian, Fire King) is confirmed as the head of the Demonic Academy, the institution where Yeo-woon, his rivals, and his eventual allies all cross paths. Mu-Hwa Yeon is the 2nd Council Elder (formerly the 10th) and, alongside Soyu Hang, one of only two female elders on the Council. Soyu Hang herself heads the Sound Clan and holds the 5th Council Elder seat, though AniList notes she was later demoted to 11th Elder, a detail worth tracking if a later chapter references her rank and it doesn't match an earlier one.

Ran-Yeong Mun rounds out the named elder roster as one of twelve expert martial artists the Demonic Cult tasks specifically with protecting something AniList's bio calls "the Kirin blood," a detail that hints at worldbuilding this guide won't spoil ahead of where the manhwa actually explains it.

Allies and Companions: the Six Swords

Yeo-woon doesn't rise alone, and the Demonic Academy arc is where AniList's character list fills in the people who end up training and fighting beside him.

Gyu Mun (AniList: Mun-Gyu, nickname Cadet 408) is the confirmed female lead. She's the granddaughter of Yun Mun, one of the Demonic Cult's elders, and she's placed on Yeo-woon's team from early in his time at the Academy, which is where most of the two characters' shared page time comes from.

Sang-Hwa Ho is named as the first female warrior to join Yeo-woon at the Academy and one of his Six Swords, a companion group this site's existing coverage hasn't previously named. AniList credits her decision to join him specifically to his strength and his character as a leader, not simply proximity. Wang-Heul Go, from the upper sect of the Magic Sword Sect, is listed as the first of the Six Swords, giving the group a confirmed founding order rather than a flat, unordered list.

Baek-Gi, from the Gentle Kick Clan, is one of Yeo-woon's most trusted followers. Heo-Bong is confirmed as his first subordinate, chronologically the earliest name to join his side. Yeo-Gun Wang, the daughter of Wang Jeon (one of the Five Greatest Martial Artists), rounds out the named companions AniList's database currently confirms.

For readers weighing Nano Machine against other manhwa that build a similarly named companion group around a low-status protagonist, the manhwa like Nano Machine guide sorts recommendations by which specific structural element hooked you, the murim setting, the system mechanic, or the escalation itself.

Step-by-Step

Here's roughly the order this cast enters the story, useful for lining up a name against wherever you currently are in the 324+ chapter run.

1. Cheon Yeo-woon, from the opening chapter, already established as the Seventh Prince and the Cheon family's least-supported claimant to the throne.
2. Yeon Hwa (Lady Hwa) and Yu-Jong Cheon, established through early backstory as his late mother and his father, the reigning Lord of the Demonic Cult.
3. Ga-Gyeong Jang, introduced as the parental figure who cared for Yeo-woon after his mother's death.
4. Maeng Seop, entering once Yeo-woon's martial arts training actually begins, serving as his first teacher.
5. The Six Clans candidates (Mu-Yeon Cheon, Gyeong-Un Cheon, Won-Ryeo Cheon, Jong-Seom Cheon, Mu-Geum Cheon), introduced as Yeo-woon enters the Demonic Academy and meets the rivals already ahead of him.
6. The Six Swords (Wang-Heul Go, Sang-Hwa Ho, and the rest of the group), forming across the Academy arc as Yeo-woon's own support network takes shape.
7. Gyu Mun, joining his team during the same Academy stretch and becoming the series' confirmed female lead.
8. Demonic Cult leadership (Hwa-Myeong Lee, Mu-Hwa Yeon, Soyu Hang, Hobeopga, Ran-Yeong Mun), becoming directly relevant once the Academy's politics connect back to the wider Cult hierarchy.

That order tracks the manhwa's own pacing rather than a wiki's alphabetical listing, since several of these names only make sense once you know what arc introduced them.

Common Character Mix-Ups

A handful of names in this cast get flattened or confused in fast recaps, and separating them out directly saves confusion later.

Cheon Yeo-woon, Yeo-Un Cheon, and Yeo-Woon Cheon are the same person under different romanizations. This site uses the first; AniList's structured name field uses the second; several of AniList's own supporting-character bios use the third. None of them is wrong.

Demonic Cult and Heavenly Demon Divine Cult are the same organization. This site's coverage uses the shorter name throughout; AniList's bio for the Great Guardian uses the fuller official name plus the related title Heavenly Demon Order.

The Six Clans candidates and generic "senior disciples" aren't interchangeable either. Recaps that describe Yeo-woon's opposition as one undifferentiated bloc of senior disciples are simplifying a structure that AniList's character data shows is actually five named people, each backed by a different clan, each with a different specific claim.

One more distinction worth making: the Six Swords (Yeo-woon's companion group, led by Wang-Heul Go) and the Six Clans (the power blocs backing his rivals) share a number but nothing else. Mixing them up in conversation with another reader is an easy way to sound like you're talking about a different arc entirely.

SSS-Class Suicide Hunter runs its own AniList-sourced cast breakdown, worth comparing if you're tracking how another murim-adjacent progression manhwa names and ranks its supporting roster.

SSS-Class Suicide Hunter Characters →

Tips for Reading This Roster

Track this cast by clan and rank first, name second. A Six Clans candidate's power in any given scene depends on which clan is backing them and how that clan's standing has shifted recently, not just their personal skill. Missing that context is how a scene meant to read as a political escalation ends up reading as a random fight.

Keep the Six Swords and the Six Clans mentally filed as opposites: one is Yeo-woon's support, the other is the group actively racing him to the throne. When a new name shows up wearing a title (Right Guardian, Great Guardian, Council Elder), that title tells you their function inside the Demonic Cult's structure before the story bothers to explain it in prose.

Don't assume every named character introduced early stays in the same rank. Soyu Hang's demotion from 5th to 11th Elder, confirmed on AniList, is a reminder that Council positions in this series are earned and lost, not fixed once assigned.

Related Reading

• Nano Machine Review: the full verdict on the hybrid cultivation-system design and where the pacing thins out.
• Nano Machine Reading Guide: arc-by-arc breakdown of the 324+ chapter run and where to start.
• Manhwa Like Nano Machine: seven picks sorted by which specific structural element hooked you.
• Nano Machine Cultivation Explained: the eight-realm ladder Yeo-woon climbs and what the nanomachine actually changes about it.
• Best Murim Manhwa 2026: where this cast's Six Clans structure sits against the genre's other sect-politics casts.

Frequently Asked Questions

Who is Cheon Yeo-woon in Nano Machine?

Cheon Yeo-woon is the series protagonist, the Seventh Prince of the Demonic Cult's ruling Cheon family. AniList's character bio lists him as the son of a servant woman who wasn't from the Six Clans, which makes him technically eligible for the throne but politically unsupported. A future descendant's nanomachine gives him the growth rate that turns that weak starting position into a real claim.

What are the Six Clans in Nano Machine?

The Six Clans are the power blocs of the Demonic Cult, and AniList's character database confirms five of their throne candidates by name: Mu-Yeon Cheon (Dark Clan), Gyeong-Un Cheon (Sword Clan), Won-Ryeo Cheon (Sound Clan), Jong-Seom Cheon (Poison Clan), and Mu-Geum Cheon (Spring Clan). Each clan backs its own candidate for the Lord's succession, and Cheon Yeo-woon starts the story with no clan behind him at all.

Who is Gyu Mun in Nano Machine?

Gyu Mun, listed on AniList as Mun-Gyu with the nickname Cadet 408, is the series' female lead. She's the granddaughter of Yun Mun, an elder of the Demonic Cult, and she's placed on Cheon Yeo-woon's team during their time at the Demonic Academy, which is where most of her page time with him happens.

Is the Demonic Cult the same organization as the Heavenly Demon Divine Cult?

Yes. This site's Nano Machine coverage uses the shorthand Demonic Cult throughout, while AniList's character bio for the Great Guardian names the full organization as the Heavenly Demon Divine Cult, with the Heavenly Demon Order as a related title. Both names point at the one faction Cheon Yeo-woon belongs to.

Who is Yu-Jong Cheon, the Lord of the Demonic Cult?

Yu-Jong Cheon is Cheon Yeo-woon's father and the reigning Lord of the Demonic Cult. AniList credits him as one of the Top Five Strongest Masters in the entire Murim, holding the title Southern Demon Lord after succeeding a predecessor named Inji Cheon. His seventh wife, Yeon Hwa, was Cheon Yeo-woon's mother.

Is Nano Machine completed or ongoing?

Ongoing. AniList lists the manga's release status as RELEASING, and this site's Nano Machine review and reading guide both track it at 324+ chapters with no announced completion date as of mid-2026.

Is this Nano Machine character guide based on the manhwa or the web novel?

The manhwa. Every name and detail in this guide traces back to AniList's character database for the manga entry (media ID 120980), checked live rather than pulled from a fan wiki. Where the two formats diverge, this guide sticks to what AniList's manga-entry bios confirm.

References

• Nano Machine on WEBTOON
• Nano Machine on AniList
• Murim (martial arts fiction genre) on Wikipedia