Sahan

Sahan is a Vampire and one of the Angels of Death that masters hypnosis skill. He was tasked by God to recruit more vampires and hunt the Pureblood. He is defeated by Hayan Park and later killed by his fellow Angels of Death.

Appearance
Sahan is a tall vampire with a pale complexion and blonde hair. Prior to encountering Hayan Park, Sahan's hair was shoulder length and generally unkempt. By the time he worked at a high school, he had cut it into a bowl cut. He has a gray honeycomb-designed tattoo on both his arms and torso. He wears khakis, a green shirt, and a lab coat.

Personality
Sahan is a very cunning and manipulative Angel of Death. He targeted high school students, particularly those with traumatic pasts, so he can more easily hypnotize and impose his will on them. He has a deep understanding of how to manipulate someone's psyche. He is also very perceptive and is able to tell when someone isn't under the influence of his hypnosis. He also has little moral restraint, and is willing to hold innocents hostage to try and get what he wants. Sahan is normally calm and collected, but he loses his composure and patience if the tables get turned on him. He also has an intolerance for disobedience, and will tighten Euntae Hwang notes Sahan is much more dangerous than fellow Angel of Death Lucian ever was.

Background
Prior to becoming a vampire, Sahan was a prisoner of an unknown organization and was being forced to watch various videos that would teach him hypnosis. Eventually, an unknown woman addresses Sahan and a group of other prisoners, declaring a competition to become an Angel of Death. While the competition was to hypnotize a monkey to rip its own heart out, the woman declares Sahan the winner almost immediately, as Sahan had managed to hypnotize the all of the woman's bodyguards to rip their hearts out on his first attempt.

Some time after becoming an Angel of Death but a few years before meeting Hayan, he was in an Daejeon city's alleyway at night confronting a large gang of vampires seeking to usurp his position as an Angel of Death. However, Sahan easily won untouched by hypnotizing all of them and forced them to tear themselves apart.

Present Day
Sahan infiltrated high schools as a psychologist in order to take advantage of teenagers with traumatic pasts. He converts them into vampires and uses hypnosis to forcibly conscript them into his personal army. Euntae Hwang notes that Sahan's forces of vampires was the fastest growing among the Angels of Death.

Sahan had recently converted Yunseo Na into a vampire. He enters the principal's office and meets Hayan Park and Euntae Hwang. He notes that Hayan seems familiar, but doesn't probe further. Later that day, he scolds Yunseo for standing out and uses hypnotism to try and keep her under control. Afterwards, having deduced Hayan is a pureblood vampire, he sets out to capture her. He uses Yunseo as bait, but as Hayan tries to pry information about Sahan from her, Yunseo begins having a PTSD episode as an effect of the hypnosis. Sahan uses hypnosis to send Yunseo reeling over in pain while covertly putting Hayan under his powers. This causes Hayan to hold back, and Sahan increases the pressure by increasing the strength of his hypnosis, forcing Hayan to flee. Sahan, with Yunseo seemingly under his control, decides to retreat when Hayan reaches a more crowded part of town.

The next day, Sahan returns to the school and begins asking Yunseo a few questions as well as give her a debrief on what her vampire powers are. However, he has suspicions about how much control he has over Yunseo, which he tests by commanding her to drink blood from a mouse. After confirming that Yunseo was not under his power, he begins physically abusing her.

Eventually, Yunseo runs outside, where Hayan and Euntae are. Sahan, however, has the advantage of it being nighttime and summons the entire student body, whom he had vampirized and hypnotized. Hayan forces Sahan elsewhere to avoid having to slaughter the students. Sahan attempts to hypnotize Hayan, but Hayan attacks him before he could initiate. Sahan, however, realizes that Hayan had figured out one of his hypnosis techniques that conducts the hypnosis via fingersnap's sound and uses another subtle one to paralyze Hayan. He attempts to hypnotize Hayan to force her to rip his heart out, but Hayan manages to overcome his hypnosis. Sahan then switches strategies and uses his hypnosis power on the population of the surrounding city, threatening to have them rip their own hearts out if Hayan doesn't surrender.

When Hayan moves to attack, Sahan attempts to have the populace do so. He believes to have been successful and that Hayan was too emotionally broken to fight. Noticing that he is about to win, he brutally attacks Hayan and saying that everything will be weak if the mental is broken already. But suddenly he is shocked to see that was all just an illusion. He realizes that Hayan had somehow learned hypnosis and had hypnotized him. He attempts to break free, but is unable to. As Hayan begins beating him, he warns Hayan that when she was under hypnosis, the repressed memories that Sahan triggered was only a portion of them, and that Hayan would be unable to handle all the memories. Hayan proceeds to grab Sahan then deal a devastating punch and arrests Sahan.

Wanting to find a vampire hideout, Euntae attaches a tracking device to Sahan and lets him escape. Sahan, still severely injured, makes his way to one of God's hideouts while vowing revenge on Hayan. At the hideout, the other Angels of Death present begin taunting him for his defeat. He shrugs off their insults, and demands to drink more Pureblood Vampire blood from God. He is furious to learn that God has left, however. Another Angel of Death, Ash, attempts to calm him down. Sahan, however, is too furious to be reasoned with and attempts to hypnotize and drink her blood instead, reasoning that since the Angels have drank God's blood, they basically have Pureblood blood in them. Using his hypnosis power, Sahan puts the hypnosis to Ash. But then, Sahan realizes that Ash is simply playing along to his hypnosis strike, all while using her power: life force drain. Too late to evade Ash's drain, Sahan is gradually becomes old as his life force depleted and eventually killed and turned into ash.

Legacy
After meeting his demise, Euntae states that Sahan's role, as one of Angels of Death is vampire breeder. Later on, it's implied that Ash, also an Angel of Death noticed something from Sahan and Hayan Battle that Hayan is able to master or receive new skill while battling other vampire, such as Sahan's hypnosis technique.

Abilities

 * Hypnosis: Sahan's signature ability is his hypnotic powers. Using this he can forcibly control anyone he faces. This can include even purebloods. Sahan's hypnotic ability is triggered via an auditory command. He is usually uses a finger snap, but he is able to activate hypnosis with the phrase "Listen to me." Sahan can adjust the degree of power he has, with varying effects. At the lowest level, Sahan is able to control his victim's emotional response. He prefers to trigger emotionally traumatic memories, which causes the victim extreme physical pain. As he increases the power, the victim's body will begin moving according to Sahan's command. Sahan does not necessarily need to verbally say the command. The victim, also, is conscious of what is happening, but is usually unable to stop it. At the highest level, Sahan is able to strip away his victim's conscious, turning them into a mindless puppet. As an Angel of Death, Sahan's hypnosis is powerful enough to bring an entire city's population under his control at once.


 * Enhanced Durability: Sahan has shown greater durability than fellow Angel of Death Lucian. Whereas Lucian died after a relatively short battle, Sahan was able to survive Hayan's finishing punch. However, the punch left enough injuries that his regenerative ability as a vampire could not quickly heal it.

Weaknesses

 * Interruptions/inability to hypnotize someone: While powerful, Sahan's hypnotic powers are completely dependent on an auditory cue. If he is attacked before he can use the cue, hypnosis won't take effect. Additionally, people with hearing difficulties, such as Yunseo, are not brought under his complete control. A strong-willed individual, or an individual expecting hypnosis to be used, is able to resist hypnosis. Hayan initially had trouble with this, due to the extreme trauma of her repressed memories, but was able to break free. Another Angel of Death, anticipating Sahan's powers, resisted it entirely and feigned weakness.
 * Lack of physical strength: While his strength was mildly enhanced by becoming a vampire, his physical strength is very weak compared to other Angels of Death. His sole claim to being an Angel of Death is because of his hypnotic powers.
 * Extreme Focus: Sahan appears to be overly focused on one goal that he loses awareness of what's going on around him. When he confronted the other Angels of Death, he was so intent on drinking a Pureblood's blood that he did not realize that Angel was draining his lifeforce from him until it was too late.