Takehiro

Ayame's older brother and generally an all-around bad person. Though he apparently attends university, he still finds time to be rude to most everyone and threaten bodily harm at the slightest provocation. He seems weirdly obsessed with his sister. People around him desperately hope it's not in an anime way.

(Don't worry, it's not.)

No one knows what he does in his spare time. Contract killing, maybe?