Yuki Aoki

Aoki Yuuki is a member of the Occult Club and one of the main characters of the "new era" arc.

Appearance
Yuuki has short, black hair and dark/black eyes.

Personality
Yuuki is very upbeat and energetic. He's very interested in the supernatural and thus loves the Occult Club.

Relationships
Mizuha

Yuuki has a crush on Mizuha and shows it very openly, even in front of her at one point, saying "A peaceful world is where your crush is in the club room.". It's unknown if she reciprocates his feelings, but she says that she likes someone who's in the same club as her. Given that Mizuha spends a lot of time with the Occult Club members, she probably likes someone from that club, which could be Yuuki.