Yuuki Anzai

Yuuki Anzai (結貴 安斎) is the male protagonist of the Devil's Line series. As a half-devil, half-human born hybrid, he utilizes his abilities as a member of the F Squad of the Public Safety Division of the police; being a police officer. He was pessimistic regarding the coexistence of devils and humans, but his thinking has been changing since he met Tsukasa Taira who became his girlfriend throughout the series.

History
Yuuki Anzai is a hybrid, and the only child born to a devil father, Tamaki Anzai, and a human mother, Midori Anzai. Despite his parents being alive, Anzai was placed in an orphanage; being a part of the Red Group of the 15th Hybrid Birth Project at ONLO. These devils are called "Children of/(raised under the) Light" by some. He was placed there to possibly protect him since he is a hybrid and because of the fact that his father was infamous for killing 15 people, but his mother still looked over him as she worked at the orphanage, though he believed he didn't have any parents. At that time, Anzai also became great friends with Tadaya Hiruta and Yuuko Tamaru.

One day, Anzai met Kirio Kikuhara when he was alone, stuck in a tree and unable to get down. When Kikuhara got him down, he explained that he just wanted someone like him to become his comrade, and proceeded to ask the little Anzai to be his friend and follow him, and the boy agreed. However, Kikuhara took him to the basement full of transformed devils and told him about his serial killer father, and that all of them were the same as Anzai, horrifying him. He then led Anzai to his father and told him about his past and how he killed his mother, this being the same path as Tamaki, Anzai's father, took. This revelation deeply shocked Anzai as he simultaneously cried and threw up. Although this event scarred him and presumably being the reason for his fear of demons, he forgot most of this until he grew up.

Normal
Anzai is a young man with an average height; standing at 176 cm (about 5'9"), and he has a fit, muscular build. He has short, messy, black hair, and his most iconic feature is a longer piece of hair that falls down in front of his face. He gets a haircut in Line 42, but maintains this feature. A small beauty mark sits on the left side of his upper lip. Anzai inherited his mother's black, messy hair and beauty-mark, but aside from that, he is noted to look exactly like his father. And since he is a devil and doesn't drink blood, he has dark circles under his eyes.

He often wears a black shirt, light pants, and dress shoes. He is always seen wearing a silver ring with a black cross on his right middle finger. This ring is actually a device for monitoring his body temperature.

Transformed
Anzai’s transformation into a devil usually follows a pattern. First, his eyes will start to turn red. Once they are completely red, his irises yellow and become cat-like. Veins will appear around his eyes. Then, simultaneously, his teeth will sharpen into fangs and his nails into claws. As a devil, Anzai is stronger, faster, and has better reaction time. Depending on what prompts his transformation, it can happen slowly or nearly instantaneously. Feelings of passion usually mean a slow transformation, when confronted with blood it’s faster, and in life or death situations it’s even faster.

Trivia

 * His average sleeping time is 6 hours.
 * His favorite foods are milk and chocolate.
 * He prefers having slip-on shoes.
 * Anzai has had a class 1 driver's license since 2010, which means he got it when he was about 18 years old.