FUTURE TIMELINE - SPOILER ALERT

One of the three core protagonists of the Keyholders' Legacy spinoff and was meant to play a prominent role in a third arc called Eternal Snow.

Bio:
An only child raised in a Keyholder family. She is in training as a Keyholder herself, but she just wants to be a normal kid.
Kaori is rash and strong-willed, often giving her parents and her teacher, Takumi, a hard time. She can be very cold and surly toward the other Keyholders, whom she holds a grudge against for taking so much of her parents' time. She does have a sweet side, but she only shows it to her parents and her fellow Keyholder trainee, Nikkou.

Relationships with other OCs:
Hideo - Her cousin and fellow Keyholder trainee. They constantly butt heads.
Toki - Her mom. The authority figure of the house.
Reka - Her dad. Kaori is a daddy's girl (and she takes after him, too).
Atsuko - Her aunt. She's not around much, and every time she is, she's in a bad mood.
Toshirou - Her uncle. He's not around much, but he seems like he'd be cool.
Nikkou - Her fellow Keyholder trainee. She adores him.
Takumi - Her teacher. He's cold and detached, and she doesn't like him at first.
Enes - He's a bit of a stick in the mud but handy to have around because of his knowledge.