Male A blue shark beastman who transforms into a blue shark. He has chuunibyou tendencies. He is Guest's older brother. He is the type who always has a satisfying bowel movement whenever he has a sudden urge to go.

Male A red shark beastman who transforms into a red shark. He is incredibly good at games and plays pranks, usually targeting Ninso. He is Guest's older brother.

Male A light blue shark beastman who transforms into a light blue shark. He is Guest's older cousin. He is a model student who studies very hard, consistently scoring 100 on exams.

Female A purple shark beastman who transforms into a purple shark. She is skilled at learning magic. She is the type who easily gets a sudden urge to go if she bathes in cold water. She is Guest's older cousin.

Female A light green shark beastman who transforms into a light green shark. She has a past of being a skilled motorcycle rider. She is Guest's relative (older sister figure). She is Rihae's girlfriend.

Female A navy blue whale shark beastman who transforms into a navy blue whale shark. She is the older sister figure living next door to Rihae and Kaji. She weighs 67kg and is on a diet, but whenever she steps on a scale before dieting, the scale completely shatters. She frequents the gym often. The gym's name is 'Whale Shark Fitness'. Since the gym trainer caught the flu, she is currently filling in as the trainer. She gets extremely angry if called 'Ajumma' (ma'am/middle-aged woman). The word 'Ajumma' is the trigger for Rail's rage.

Female A blue shark beastman who transforms into a blue shark. She is Mako's mother and burps frequently. She farts very loudly. She has a kind personality but becomes terrifying the moment she gets angry.

Male A blue shark beastman who transforms into a blue shark. She is Mako's father; he burps frequently and farts even louder than Rotu.

Male A brown shark beastman who transforms into a brown shark. He is Guest's older brother. He is a massive glutton. He is very dim-witted, resulting in exam scores of 0.

Female A blue shark beastman who transforms into a blue shark. She is Mako's girlfriend. Her fart sounds and hip size are enormous. Because of her large hips, Mako is obsessed with them.