Weak Hero Character Guide: Gray Yeon and the Full Roster

TL;DR: This Weak Hero character guide covers the manhwa's own named roster, verified against AniList, not the Netflix or Wavve drama cast. Gray Yeon (Si-Eun Yeon) is the lead, Ben Park is his closest ally, and Jake Ji and Donald Na are the two rivals readers ask about most, out of 23 confirmed named characters across the completed 268-chapter run.

Search "Weak Hero character guide" and most of what comes back is actually about the show. Screen Rant profiles the actors. MyDramaList tracks the cast of Weak Hero Class 1 and Class 2. A Fandom wiki organizes the manhwa's cast school by school, which is closer to what a manhwa reader actually needs, but it isn't sourced against anything a search engine treats as authoritative.

This guide sticks to the source material: the webtoon by Seopass and Razen, cross-checked against AniList's character database rather than copied from memory or from a wiki page. For the verdict on whether the series is worth reading, see the Weak Hero review. For arc order and where the tone shifts, see the Weak Hero reading guide. This piece is neither of those. It's the cast list, organized by who matters and why.

Key Takeaways

• This guide covers the manhwa's cast, not the cast of the Netflix/Wavve drama adaptation.
• Gray Yeon (full name Si-Eun Yeon) is the protagonist; "Gray" is WEBTOON's official English localization, not a fan nickname.
• Ben Park (Hu-Min Park) is Gray's closest ally. Jake Ji (Hak-Ho Ji) and Donald Na (Baek-Jin Na) are the two rivals with the most narrative weight.
• Seopass writes the series and Jin-Seok Kim draws it under the pen name Razen. Some older coverage online gets this wrong.
• AniList's character page lists 23 named characters total for the manhwa: 4 main-billed, 19 supporting.
• Names shift between the raw Korean romanization, the official English localization, and in-story nicknames. All three can refer to the same person.

Weak Hero Character Guide: Manhwa Cast, Not the Netflix Drama

Two separate things share the name "Weak Hero." The manhwa is the original: a webtoon that ran on WEBTOON from 2019, written by Seopass with art by Jin-Seok Kim under the pen name Razen, and it completed at 268 chapters. The drama is the adaptation: Weak Hero Class 1 premiered on Wavve in 2022 with eight episodes, and Weak Hero Class 2 followed on Netflix in 2025, also eight episodes, starring Park Ji-hoon, Choi Hyun-wook, and Hong Kyung.

The confusion is understandable. Both versions follow the same protagonist through the same premise: a small, academically sharp transfer student who dismantles school violence through precision rather than size. But a TV adaptation makes choices a webtoon doesn't have to. Characters get combined, cut, or invented for pacing reasons that only make sense on screen. A name that shows up in drama recaps isn't automatically a name that exists on the page.

That's the gap this Weak Hero character guide is built to close.

Every name below traces back to AniList's own character listing for the manhwa (media ID 113488), which draws its data from the source material rather than the show. Where a name only turned up in drama coverage during research, it's been left out rather than guessed at.

Weak Hero sits inside a wider field of school-set and gang-adjacent action manhwa, and knowing the cast here makes it easier to see where the series overlaps with (and departs from) the rest of the genre. .

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Gray Yeon: The Protagonist of Weak Hero

Gray Yeon is the character most readers arrive at this guide looking for, and he's also the clearest example of the naming issue. AniList's character page lists his full name as Si-Eun Yeon, with "Gray Yeon" recorded as an alternative name and "은장 백사 (Eunjang Baeksa)," translated as "Eunjang's White Mamba," as an in-story nickname he earns rather than one he starts with. WEBTOON's own synopsis for the series introduces him the same way: "a mysterious new student" named Gray who "threatens to dismantle the established order."

Both names are correct. Si-Eun Yeon is the direct transliteration of his Korean name (연시은); Gray is the localized name used in the official English translation. This guide uses "Gray" and "Gray Yeon" throughout, matching WEBTOON's own English release, but it's worth knowing the Korean-language name if you're cross-referencing AniList, MyAnimeList, or a Korean-language source and the name doesn't immediately match what you've read.

What makes Gray specific as a protagonist isn't a power set. He doesn't have one. He transfers into Eunjang High small, quiet, and academically focused, and the fights he wins come from reading an opponent's weight and committing to a target before the other person realizes the exchange is already decided. That constraint holds for the entire run. It's also the reason the nickname "Eunjang's White Mamba" fits: a mamba doesn't win by being bigger than what it strikes.

Ben Park, Alex Go, and Gray's Closest Allies

Three characters carry main-cast billing on AniList alongside Gray: Ben Park, Alex Go, and Gerard Jin.

Ben Park (full name Hu-Min Park, also credited as "Big Ben") is the character readers end up caring about most after Gray himself. He's Gray's closest ally across the run, and functionally he's the series' moral register. Gray reads a fight in terms of angles and outcomes. Ben registers what a fight costs the people standing around it. That split does real work in a story about violence: it keeps Weak Hero from reading as purely tactical, because at least one character on the page is always tracking the human cost.

Alex Go (Hyeon-Tak Go, also credited as "Gogo" and "The Pit Bull") holds main-cast status in AniList's listing alongside Gray and Ben. The available character data confirms his name and his standing in the main cast; it doesn't hand over plot specifics, and this guide isn't going to invent them. If you've read further into the run than the early chapters, his role will already be familiar. If you haven't, that's a reasonable thing to discover on the page rather than in a roster list.

Gerard Jin (Ga-Yol Jin) rounds out the four main-billed characters. Same note applies: confirmed as main cast, confirmed by name, and left for the story itself to develop rather than summarized here.

The pattern across all three: Weak Hero's main cast isn't built around Gray having a found-family entourage that mirrors his fighting style. It's built around people who occupy the same school and orbit that continue to matter as the stakes escalate past Eunjang High.

Jake Ji, Donald Na, and Weak Hero's Key Rivals

Two names come up more than any other when readers ask about Weak Hero's antagonists, and they do different jobs.

Jake Ji (Hak-Ho Ji) is the closest thing the manhwa has to a dark mirror for Gray. He fights with something close to Gray's own instinct for angles and openings, but without Gray's restraint. The comparison is never spelled out as a lesson; it just sits there, chapter after chapter, as a version of the same capability pointed in a different direction. Readers who want to know "what happens to someone like Gray who doesn't hold back" get their answer through Jake Ji rather than through anything Gray says about him.

Donald Na (Baek-Jin Na) is the first character to bring organizational weight into a story that starts, deliberately, as school-level conflict between individuals. His arc is the hinge point where Weak Hero stops being containable to one building's hallway politics. What Donald Na represents isn't a bigger fighter than the ones before him; it's the first confirmation that some problems don't resolve just because you can win the fight in front of you.

Both names are confirmed in AniList's supporting-cast listing (Hak-Ho Ji and Baek-Jin Na, respectively), which matches how they're treated in the manhwa's own arc structure: not villains introduced for a single confrontation, but pressure points that change what kind of story Weak Hero is telling.

Gray's dynamic with Jake Ji is the sharpest version of a pattern that shows up across the genre: a protagonist defined by restraint, set against a rival built from the same toolkit without it. If that's the specific thing that pulled you toward Weak Hero, there's a shortlist of manhwa built on the same tension. .

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Step-by-Step

Weak Hero's cast expands fast once the story moves past the first arc, and readers hit the same confusion points repeatedly. Here's how to keep the roster straight without relying on memory.

1. Default to the English localization name, not the raw Korean romanization. If a source calls him "Si-Eun Yeon" and another calls him "Gray Yeon," they're describing the same person. WEBTOON's official translation uses "Gray." Community discussion and AniList often use both, so check which convention a given source is using before assuming a name mismatch means a different character.

2. Separate manhwa canon from drama canon before you trust a name. If a character only appears in recaps of Weak Hero Class 1 or Class 2, don't assume they're in the webtoon. The drama adds characters and restructures relationships for an eight-episode format; the manhwa's cast is what AniList's character page (and the WEBTOON release itself) actually confirms.

3. Track relationships by role, not by which school someone attends. A fan wiki organizing the cast school-by-school is a reasonable browsing structure, but it isn't something this guide can verify chapter-by-chapter without risking a wrong affiliation. Role, ally, rival, or wider-network figure, is the safer axis to sort by.

4. Use AniList's staff and character credits as the tiebreaker when sources disagree. Some older coverage of this series lists the author as "SH." AniList's staff listing, WEBTOON's own credits page, and the drama's Wikipedia entry all agree on Seopass for the story and Jin-Seok Kim, working under the pen name Razen, for the art.

5. Expect nicknames to carry more weight than surnames in fan discussion. "Big Ben," "The Pit Bull," "Tapeman," and "Totem Pole" all show up more in reader conversation than the formal Korean names attached to them. Learning the nickname alongside the full name early saves a lot of confusion three arcs later.

The Weak Hero Character Guide's Full Named Roster

Beyond the protagonist, his closest allies, and his two most significant rivals, AniList's character page for the manhwa lists 19 additional named supporting characters. Most of them surface as the gang network around Eunjang High widens past the first arc. This guide isn't going to assign each one a backstory it can't verify, but knowing the name-to-nickname mapping ahead of time makes the wider cast easier to track once they appear on the page:

• Stephen Ahn (Su-Ho Ahn), also credited as "Tapeman"
• Wolf Keum (Seong-Je Geum)
• Kingsley Kwan (Seok-Hyeon Gwan)
• Ghost (Dong-Ha Baek)
• Timothy Park (Tae-Gi Park), also credited as "Big Data"
• Totem Pole (Seong-Mok Do)
• Dean Kwon (Hyeok-Jin Kwon)
• Rowan Im (Ju-Yang Im)
• Harper Ha (Hui-Cheol Ha), also credited as "Helmet"
• Eugene Gale (Jun-Tae Seo)
• Sam Lee (Gong-Sam Lee), also credited as "Grape"
• Jimmy Bae (Ji-Hun Bae)
• Forrest Lee (Se-Han Lee)
• Eunchan (Eun-Chan Hong)
• Teddy Jin (Tae-O Jin)
• Myles Joo (Seung-Jin Joo)
• Nak-Seong Yoon

Every entry above appears on AniList's character listing for the manhwa. None of it is copied from the Fandom wiki's school-by-school breakdown or from drama recap sites, both of which cover overlapping but not identical territory. If a name you're looking for isn't here, it's most likely either a very minor mention AniList hasn't catalogued yet, or a character specific to the drama.

Tips for Reading the Weak Hero Character Guide Alongside the Manhwa

A few habits make the cast easier to hold onto once you're actually reading, rather than just looking a name up after the fact.

Read the names in context before you memorize them. A list like the one above is useful as a reference, not as something to study in advance. Weak Hero introduces most of its supporting cast through action rather than dialogue-heavy introductions, so a name usually means more once you've seen what that character does.

Don't assume symmetry between "main cast" and "important cast." AniList's MAIN designation for Alex Go and Gerard Jin reflects their overall billing in the character database, not necessarily how much page time they get in any single arc. Some supporting-billed characters, Jake Ji and Donald Na among them, carry more narrative weight than their formal listing suggests.

Treat nicknames as load-bearing. Weak Hero's cast accumulates nicknames the way real school hierarchies do, through reputation rather than formal introduction. "The Pit Bull" and "Tapeman" aren't decorative; readers use them constantly in community discussion, and knowing them ahead of time removes a layer of friction.

If you're coming from the review or the reading guide rather than starting fresh, the cast will already be partly familiar. This guide is meant to sit alongside those two, not replace either one.

Common Mistakes When Referencing Weak Hero's Cast

A few specific errors show up repeatedly in secondary coverage of this series, and they're worth flagging directly.

Crediting the author as "SH." Some existing write-ups shorten or garble the writer's name. The correct credit, confirmed on AniList and on WEBTOON's own series page, is Seopass.

Attributing the art to an unverified pen name. The artist's confirmed pen name is Razen (real name Jin-Seok Kim, per AniList's staff listing). Any variant that doesn't match this should be treated as unverified until checked against a primary source.

Treating drama-only characters as manhwa canon. Characters introduced specifically for Weak Hero Class 1 or Class 2 to serve an eight-episode structure aren't automatically part of the source webtoon's cast. When in doubt, check whether a name appears on AniList's character page for the manga entry specifically, not the drama's own listing.

Assuming a Fandom wiki's organizational structure reflects confirmed plot detail. A wiki organized by school is a useful map, but "organized by" isn't the same as "sourced against" a primary reference. This guide draws its names from AniList and WEBTOON specifically so that distinction holds.

Related Reading

• Lookism Reading Guide: The closest thematic companion on the site, same school-hierarchy setting, different protagonist logic, worth comparing cast dynamics against.
• Lookism Character Guide: the full named roster for that comparison, Daniel Park's two bodies, Vasco's gang, and the faction structure Weak Hero's tighter cast doesn't need.
• Best Completed Manhwa: Where Weak Hero's finished 268-chapter run sits alongside the rest of the genre's completed series.

Frequently Asked Questions

Who is the protagonist of Weak Hero the manhwa?

Gray Yeon, whose full name is Si-Eun Yeon (연시은) in AniList's character database. Gray is the localized English name used in WEBTOON's official translation; Si-Eun Yeon is the direct romanization of his Korean name. Both refer to the same character.

Is this Weak Hero character guide about the manhwa or the Netflix drama?

The manhwa. The live-action adaptation (Weak Hero Class 1 on Wavve, Weak Hero Class 2 on Netflix) shares the source material but recasts the story with actors and, in Class 2, adds characters built for the show. This guide covers only the roster confirmed in the original webtoon by Seopass and Razen.

What is Gray's real name in Weak Hero?

Si-Eun Yeon. AniList lists his alternative names as Gray Yeon and 은장 백사 (Eunjang Baeksa), translated as Eunjang's White Mamba, an in-story nickname he earns rather than a birth name.

Who is Ben Park in Weak Hero?

Ben Park, full name Hu-Min Park, is Gray's closest ally through the manhwa's 268-chapter run. He's also credited as Big Ben. Where Gray's method is entirely tactical, Ben is the character who registers what the fighting actually costs the people around them.

Who are Weak Hero's main rivals and antagonists?

Jake Ji (Hak-Ho Ji) and Donald Na (Baek-Jin Na) are the two names readers ask about most. Jake Ji fights with a version of Gray's own instincts but without his restraint. Donald Na is the first antagonist to bring organized backing into a story that starts as school-level conflict.

Who wrote and illustrated Weak Hero?

Seopass writes the story and Jin-Seok Kim draws it under the pen name Razen. Both credits are confirmed on AniList's staff listing and on the WEBTOON series page itself, and Wikipedia's entry on the drama adaptation cites the same two names for the source webtoon.

How many named characters appear in Weak Hero?

AniList's character database lists 23 named characters for the manhwa, split between 4 main-billed roles and 19 supporting roles. Most supporting characters surface as the story's gang network expands past Eunjang High.

References

• Weak Hero on WEBTOON
• Weak Hero (manga) on AniList
• Weak Hero (TV series) on Wikipedia