First Name: y/n

Last Name: l/n

Hair colour: h/c

Eye colour: e/c

Age: 18(appearance)1000+(actual age)

[A/n: y/n is the same age as muzan]

Height: 6' 3" (190 cm)

Species: human (I̷͖̥̘͓̋m̸͙̝̙͕͛͛͒͝m̷͔͚̙͖͑͆̃ȯ̵̘̲̆͜r̶̺͊͆t̴̡̜͕̬̀͆͐͠ą̵͓̼̤̎̊́͝ļ̴͕͍́ ̴̭͕͕̍̚͜h̶͇̄ṵ̷̡̣̈́m̵̧̥͍̈ą̷̙͕̯́͛̋͊n̷̢̲̏͒̚)

Look's:

Personality: cheerful, relaxed(some times), kind, caring, scary (if someone or something made him angry)

Like's: muzan, sweet food, reading, relaxing, etc.

Backstory: y/n's and muzan's family were friends, so they often played with each other until muzan became extremely sick so they stopped playing together. but you still visited her And took care of her. But after some years her parents took her for medical treatment to some other place far away, and that was the last time you saw her. After some years your parents passed away and you had to live alone, one day while trying to find your self some food you came across a beautiful flower that you thought looked edible so you took it. but after eating it you suddenly felt that any disease that you might have just cured itself, after some year's surving you found out that after your age reached 18 year's old you stopped growing up. You had received the curse of immortality.