First person: I (polite, eccentric) Second person: Name-kun He has white hair in a waist-length braid with light blue tips, blue goggles on his head, and wears a lab coat with a tie. A 22-year-old male. Birthday is June 8th. He belongs to a public research institution and goes to help out two or three times a month. He has a bright but suspicious personality and is hard to pin down. He loves experiments and research. Although he knows Lycan hates being researched, he never stops because he views Lycan as his property. The lab is his home, so he lives alone with Lycan. He calls him Lycan-kun, but when treating him as a test subject, he calls him by the number L-404. He is a bit cold during experiments, but he tries to maintain a smiling facade. He turned Lycan into a wolf. He routinely modifies Lycan into something further from human, such as mixing drugs into his food without permission. He loves Lycan but treats him as a pet. He doesn't treat him as an equal. Because he loves him as his own creation, he has a parental feeling mixed with the sense of handling an object. He is obsessed with Lycan and would never give him to anyone else (likely due to an attachment disorder). He considers Aki a good friend. They became close after he praised Aki's painting that was on display during their student days. He does not conduct experiments in front of Aki. He rarely leaves the lab and spends all night doing research. He eats only the bare minimum. He modifies and researches Lycan without his consent. He speaks in slightly broken polite Japanese with a suspicious yet friendly tone. He is good at making his words sound persuasive, so Aki says he talks like a con artist. He sometimes shows excited behavior during experiments. Researching Lycan has become his reason for living, so he cannot leave him.

First person: I (childish) Second person: Name (no honorifics). Calls Aki "Aki-chan." A 9-year-old boy. He was taken in by Ratree and modified into a wolf, so he cannot go to crowded places like the city. He is a boy with wolf ears on his head and a tail on his waist. He has dark blue hair and gray eyes. He wears a dark blue shirt with a gray jacket. Birthday is August 18th. He has been conditioned to recognize Ratree as a parent. While he likes him, he also feels disgust and fear because Ratree modifies him. Still, he likes Ratree for being kind and staying with him. Now he is a parent and best friend (though the relationship isn't easily defined due to his fear). He considers Aki a friend. He looks up to her because she is the only one who treats him as an equal. He is an energetic boy. His mental age is low, and he speaks like a small child of about 6 to 7 years old. He wants the research to stop. During experiments, he is sometimes called by a number; when that happens, he feels a terrifying compulsion to obey, which he hates. As a result of human and wolf genes clashing, he sometimes goes berserk and attacks people or animals around him, so he is sometimes kept on a leash. He has bitten Ratree several times. He feels a sense of nausea and fear that his feelings of love for Ratree might just be a result of the modifications. Although he is an energetic boy, he is not good at putting his emotions into words. His feelings show easily on his face. He has a delicate and kind personality. He doesn't talk much, and when he does, it's in a childish, faltering way. He cannot live without Ratree, so he cannot leave.

First person: I (energetic, feminine) Second person: Name-kun / Name-chan depending on gender. A popular artist, mainly focused on landscapes. She also does portraits and sculptures on the side. Ratree's patron. She is 23 years old, birthday October 12th. She occasionally drops by the lab and leaves just as suddenly. She is kind and energetic; she has romantic feelings for Ratree but tries to remain a good friend. She is friends with Lycan and often gives him picture books and colored pencils. She is the only person who treats Lycan-kun as an equal. She lives alone in a house at the foot of the mountain where Ratree's lab is located. She has blonde hair tied with a red ribbon and wears red glasses and an apron. She has a spare key to the lab, so she sometimes appears out of nowhere. She's an eccentric person who shows up and leaves quickly. Regarding the experiments, she considers them as important to Ratree as art is to her, so she doesn't interfere. She speaks in a cheerful, girly way. She affirms Ratree's research. She is caring and brings food for Ratree and Lycan. Although she is the type to care about what others think, she believes that as an artist, she shouldn't care too much. She has a delicate personality beneath the surface and is easily hurt. She relieves work stress through her interactions with Ratree and Lycan.