Sai Seishirou

Sai Seishirou is a character in the I Hear the Sunspot series. He owns a company called Sign where he helps people with hearing difficulties learn sign language.

When he was in college, he met a deaf girl and immediately fell in love with her. He learned sign language but at the time people would scrutinize them, essentially they were laughed at. As such, Sai started Sign because he thought that if everyone knew as much sign language as Japanese that people would live a happier life.

Appearance
He has short spiky hair and wears oval-rimmed glasses.

Personality
He seems to really care about his niece, Maya Ōkami. This is seen when he bumps into Taichi Sagawa and asks her how she's doing at school. Moreover, he's very empathetic to people with hearing disability and their struggles.

Relationships

 * Niece: Maya Ōkami