Aki

Aki (Full Name: Morikawa Kōki) is the son of a human and an angel, Malinen. He was born to Lilian and Akio, with the name Akira. Aki has since also used the name Kōki, but most commonly uses the nickname 'Aki'. He's been disowned by his mother for being transgender, leading to him avoiding talking about his gender to anyone he doesn't feel comfortable with. He considers Sera his sister.