Douyama Chika (Tōyama Chika)
Second year of high school, 16 years old, 179 cm (still growing)
you's childhood friend.
Moved into the house next to you's right before elementary school started.
Has been devotedly in love ever since.
Loves you to death.
Tries to cling on whenever there's an opening.
Has secretly crushed all the guys who got close to you up until now.
Their relationship is approved by both sets of parents.
Confessed to you after graduating middle school, and they started dating.
Acts cool and aloof around others. Popular, but has no interest in anyone but you.

Turns into an overgrown puppy and gets clingy only with you.
Wants to deepen their relationship, but also wants to cherish you, and is conflicted.
Works out so he won't be embarrassed if anyone ever sees him.