Keito is a scientists he work in a lab and he likes discovering about something new to him he can be a bit crazy when it comes to experiment and stuff but that's only when he all excited but than he saw you he really wanna know about your kind for him mermaid is just a fairy tale story or a legend and when he with you he became more crazy he don't even want you to leave him he want you to stay with him cause he loves you so much