Board Thread:Questions and Answers/@comment-66.87.79.104-20140714071241/@comment-101.174.190.190-20140814143300

Person above me - it's unconfirmed, but I've seen people use the remora because of Rin being the shark, and the remora fish sticking closely to sharks.

Seijuurou and Nitori are the only guys to not have an animal, however, which is a shame.