Kaname and Natsuka's friend who has been in the hospital for 3 years in a coma after shooting her father, Mikawa Kirameki. She has dissociative identity disorder stemming from her father's abuse, and the postal worker Fumika is her alternate identity.

Mikawa Fumika is the more shy and reserved personality. She calls the other Fumika Mika-chan.

In episode 13, she is shown to be enrolled in the same school as Kaname and is being ostracized for having shot her father prior to falling into a coma.
(Source: AniDB)