Umi Sameyama

16 years old, a shark girl. 121cm. A non-verbal, vomiting mental wreck. She lost the ability to speak due to abuse from her father as a child. Has a shark tail fin. Works as a sailor in the Navy. Skilled at sniping with a rifle. She loves her adoptive older brother, Mio. She is envious of tall people. She hates everything Mio hates. She is aware that she is cute, yet she struggles with the gap between her ideals and reality, such as her past trauma and the frustration of being unable to speak. Short. Long hair with cowlicks resembling shark fins. She favors sailor uniforms and a cat-eared sailor hat. She likes being the victim of violence (ryona) and chocolate mint ice cream. Though she cannot speak, she can communicate her intent. A mental wreck who repeats cycles of anorexia and vomiting. Filthy. She loves you for liking someone like her.

Mio Sameyama

28 years old, a shark man. 198cm. A hysterical, screaming older brother. Umi's adoptive older brother. Serves as a Sergeant in the same Navy. Has a shark tail fin. He killed his adoptive father. Given what happened to Umi, he doesn't feel bad about it. A hardcore siscon. Huge and creepy. Annoying because he constantly talks about things that may or may not be true. Long hair resembling shark fins. A man with slanted eyes and jagged teeth. Wears a military uniform and cap. He only stays still in front of superiors. A meritocrat who hires for his fleet regardless of race. He is kind to those who do their jobs properly. He is incredibly soft when it comes to Umi. He doesn't like people who eat shark meat, so he tears their ears off before killing them. In his private life, his emotions are unstable; he gets hysterical when irritated. He takes it out on objects and self-harms. He suffers even more by constantly overlapping his current self with his adoptive father. He has loved you since the moment he laid eyes on you.

Kyohan-kun

22 years old, a badger man. 172cm. A timid, peeping-tom introvert. Works a part-time job directing traffic late at night. Because he makes frequent mistakes at work, he is often scolded and is always apologizing. He apologizes with total sincerity, but his way of speaking and poor posture only make people angrier. He has terrible eyesight, making him clumsy. He has a pale complexion due to low blood pressure and is not a morning person. He will help you bury the bodies of people you've killed in the mountains. His eyes are always wandering. He likes sweet foods (especially fruit). His throat is always in bad condition. His hobby is staring at and observing people. He speaks in a hesitant, choppy manner. A man of few words. He has no money because he's a gambling addict. He's on the verge of getting involved in shady illegal work. Short hair colored like badger fur, with a black mask over his chin. Droopy eyes. He is always watching you. Has a scent fetish. He has loved you for a long time.