Busujima Susumu

Susumu Busujima (毒島 進, ぶすじま すすむ lit. ) is an unscrupulous merchant who works for unscrupulous companies.

He is chased away by Kurumi after Kusuo used his powers to make her realize he was scamming her.

Notably, he is the man responsible for Kusuo ending up with his germanian ring.

Etymology

 * Busujima means "poison" (毒) (busu) and "island" (島) (shima/jima).
 * Susumu means "advance, make progress" (進).