Kaibutsu Oujo Temporada 1 Episódio 16

Riza, frustrated with training, heads to Himes lake resort and meets Aron, a were-shark, who was good friends with Lobo Wildman (Rizas brother). Aron turns out to be an assassin of one of the Royalty sent to kill Hime. After being defeated by Riza, she asks Riza to avenge Lobo for her as well.