Unholy Blood Characters: Hayan, Euntae, and the Angels

Unholy Blood characters split into three groups once the plot gets moving: the two leads hiding what they are from the people around them, the Angels of Death enforcing a vampire empire's will, and the ordinary family members caught in the middle of both.

TL;DR: Unholy Blood characters, wiki-verified: Hayan Park (the only true Pureblood Vampire and the series' protagonist), Euntae Hwang (the police captain secretly hiding his own vampirism), Yohan (the childhood-friend-turned-mastermind behind the whole crisis), and Vael (an Angel of Death playing a longer game than his loyalty to Yohan suggests). The full cast below covers who's actually working for whom.

Unholy Blood Character Guide: Key Takeaways

• Hayan Park is the story's only confirmed true Pureblood Vampire, adopted by Father Michael after her biological parents were murdered
• Euntae Hwang starts as a regular vampire hiding from the police force he works for, and becomes a Pureblood himself partway through the story
• Yohan, publicly known as "God," is Hayan's own childhood friend before he becomes the series' main antagonist
• Vael, one of the six Angels of Death, is secretly working against Yohan the entire time to save his pet lion, Daniel
• The series runs 92 episodes (including an epilogue) and is completed, so every relationship below resolves by the end

Overview: Why This Cast Runs on Double Identities

Nearly every major character in Unholy Blood is hiding something specific from the people closest to them, and tracking who knows what about whom is most of what makes the plot move.

Hayan hides her vampirism from ordinary society while working with the police to destroy the same vampire network she secretly belongs to. Euntae hides his own vampirism from the police force he captains, including, for a long stretch, from Hayan herself. Yohan hides his true identity as "God" behind a human disguise for most of the story, including from Hayan directly. Vael hides his real loyalty from Yohan while performing the role of an obedient Angel of Death. Once a reader knows which secret belongs to which character, scenes that look like straightforward action sequences reveal a second layer of tension underneath.

For the full verdict on how Unholy Blood's story holds together across all 92 episodes:

Unholy Blood Review →

Unholy Blood Characters: The Two Leads

Hayan Park is the protagonist and the only known true Pureblood Vampire in the series. Raised by her human parents until Yohan murdered them and left her orphaned, she's adopted by Father Michael, who hides her nature from the world and helps her control her power with a crown of thorns. She spends most of the series suppressing memories of her childhood trauma, which also suppresses her full abilities; as she recovers those memories fighting the Angels of Death one by one, her power grows in step. Her stated goal is straightforward: destroy the vampire empire responsible for her parents' deaths, while protecting the innocent people the Angels exploit along the way.

Euntae Hwang is the Captain of the Criminal Investigations Division and the head of the Vampire Task Force, which makes his own vampirism a genuinely dangerous secret to be holding. Turned as a teenager after his biological parents were revealed as vampires and killed by a vampire caretaker, he drank his dying parents' blood to save his sister Haeun, then never told her why. He meets Hayan while investigating a vampire incident, deduces she's a Pureblood, and the two form a partnership that becomes a working relationship, then something more; by the story's end, he proposes and she accepts. He later becomes a Pureblood himself after receiving Hayan's blood.

Hayan Park's vampire-form design. Her white hair and blue eyes only appear when she's not disguised as human.

Unholy Blood Characters: Yohan and the Angels of Death

Yohan, publicly operating under the alias "God," is the series' main antagonist and the person responsible for turning Korea's vampire crisis loose in the first place. He was Hayan's first childhood friend and the first person outside Father Michael to learn she was a vampire. After being turned himself and losing everyone who ever showed him kindness, he became a vindictive, self-centered mastermind who commands six elite lieutenants, the Angels of Death, while working toward a plan to consume Hayan's fully matured heart. The wiki's own character summary is clear that his feelings toward Hayan are more complicated than pure malice by the story's later chapters, without softening what he actually does to get there.

Vael, alias "Sliver Hairtail," is one of the six Angels of Death and, for most of the story, appears to be Yohan's loyal right hand. In reality, he's secretly working to undermine Yohan the whole time, motivated by a single relationship: his bond with his pet lion Daniel, whom he turned into a vampire years earlier and who is now dying. A former magician who uses illusion and pyrokinesis in combat, Vael eventually defects openly to Hayan and Euntae's side, though his history with Yohan gives both of them real reason to stay cautious around him even after he switches sides.

For where the series starts and how the arcs build toward the ending:

Unholy Blood Reading Guide →

Unholy Blood Characters: Family and Household

Father Michael is Hayan's adoptive father, the man who took her in after her parents' deaths and helped her hide her vampire nature from the world, including crafting the crown of thorns she uses to control her full power. His death early in the story is the event that pushes Hayan from hiding to actively hunting the vampire network.

Haeun Hwang is Euntae's younger sister. The two were close growing up, but Euntae's silence about why he became a vampire fractures their relationship for years; they reconcile once Hayan tells Haeun the truth and Haeun realizes Euntae never stopped caring, symbolized by a charm bracelet he'd kept since they were kids.

Yerim Park and Yunsu Park are Hayan's adoptive siblings under Father Michael's household, part of the found family Hayan is protecting as much as she's protecting the wider public.

Step-by-Step

The wiki's episode-cited first appearances line up into the order this cast actually shows up on the page.

1. Hayan Park: Episode 1. The story opens with Hayan already active as a Pureblood hiding in plain sight as a university student.

2. Euntae Hwang: Episode 1. He's introduced the same episode, investigating a vampire incident from the police side before he and Hayan formally meet.

3. Father Michael: established in the opening chapters as Hayan's adoptive father, before his death becomes the story's inciting event for her active vampire-hunting arc.

4. Yohan: Episode 2 (flashback), full appearance Episode 48. He's referenced through Hayan's backstory long before the manhwa reveals "God" is the same person.

5. Vael: cameo Episode 6, full introduction Episode 38. He's mentioned among the Angels of Death before getting his own extended appearance.

Tips for Keeping This Cast Straight

1. Track who's hiding vampirism from whom. Hayan hides hers from society, Euntae hides his from the police force he leads, and Yohan hides his identity as "God" from almost everyone. The tension in most scenes comes from these secrets almost slipping.

2. Don't assume every Angel of Death is loyal to Yohan the same way. Vael's loyalty is a performance from early on. Other Angels, mentioned throughout the story like Sahan, Ash, Lucian, and Mamon, are more straightforwardly working for Yohan's actual goals.

3. Remember Yohan and Hayan have real history, not just a villain-hero dynamic. He was her first friend before he became the person responsible for her parents' deaths. That history is why the story treats their confrontations as personal, not just tactical.

4. Watch for characters whose loyalty shifts mid-story. Vael's defection is the clearest example, but the wiki's own synopsis notes several side characters (a corrupt police chief, a compromised boyfriend) who flip allegiance once their own self-interest is threatened.

Frequently Asked Questions

Who is the main character in Unholy Blood?

Hayan Park, the only known true Pureblood Vampire in the series, who hunts the vampire network responsible for her parents' deaths while hiding her own nature.

Is Euntae Hwang a vampire?

Yes. Turned as a teenager to save his sister, and later becomes a Pureblood himself after receiving Hayan's blood.

Who is the villain in Unholy Blood?

Yohan, publicly known as "God," Hayan's own childhood friend before he becomes the series' main antagonist and the source of Korea's vampire crisis.

Do Hayan and Euntae end up together?

Yes, confirmed directly in the character wiki's relationship summary: Euntae proposes by the story's end and Hayan accepts.

Is Vael a good guy or bad guy in Unholy Blood?

Neither cleanly. He performs loyalty to Yohan while secretly working against him to save his pet lion, Daniel, and eventually defects openly.

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

The manhwa. Every detail here traces back to the Unholy Blood Wiki's own character pages, cross-checked against this site's existing review.

Related Reading

• Unholy Blood Review
• Unholy Blood Reading Guide
• Manhwa Like Unholy Blood
• Best Thriller Manhwa
• Best Completed Manhwa

References

• Unholy Blood Wiki (Fandom)
• Unholy Blood on WEBTOON