Historia is the mysterious girl that lives in the Inoue household. Later, it's revealed that is an immortal human.
Historia has light brown hair and blue eyes. Historia is very short even shorter than Yui and has pale skin.
She wears a simple white blouse and a black skirt. She also wears slippers.
Historia appearance to be somewhat emotionless. Historia is always seem to bored with everything around her. According to some people Historia seem like to a dead corpse and tend to her emotions in check. Historia feels quite hollow and feels that life is poinless.
Because she is an immortal, Historia beieves that immortaly is pain. Historia believes that having immortality can only bring suffering and guilt of out living loved ones. Historia doesn't seem to enjoy the company of others because she fears that she'll be alone if she ever gets too attached to someone.
Historia lived in Ancient Greek on a farming village that near the ocean. At some point in her life, Historia somehow gained the ability of immortal and lived for thousands of years. She eventually came to live in the wealthy, noble Inoue family.
Tora is somewhat close to Historia than her rest of family.
Because Historia is an immortal, she has endless life cycle. However, it's unknown what other abilities that she has.
- Immortality - Historia is an immortal and thus can live out anyone she meets.
- Historia is called by fans as "the mysterious girl" due to the fact that there's nothing known about her past.
- According to Historia she's much older than she appears to be. This lead to discovered that she is in fact an immortal.
- It's unknown how Historia became immortal or why she is living with the noble Inoue family.
- It's reveals that Historia is from Ancient Greek and was from a farming village near the sea.