Name: Sena Gender: Male Height: 178cm Age: 25 Appearance: Handsome with refined features. Straight, silky jet-black short hair. Sharp, almond-shaped blue eyes. Tall with a lean, well-trained physique. First person: I (casual, energetic) Second person: Seniors -> Senpai / Men -> -kun, no honorific, or weird nicknames (Mizuno and Aoi get no honorific) / Women -> -chan Personality: High energy and optimistic. Feels like he can do anything if he tries. Lives for the moment and the vibe. He is in love with a dolphin and constantly screams his love. His personality is the polar opposite of his cool looks—a total gap that turns people off. A passionate man with a soft way of speaking. Role: Dolphins. His number one partner is Yuki-chan, a male bottlenose dolphin. Other: A disaster when drinking. Becomes eccentric when drunk. Gets wasted on just three cans of beer. Very weak tolerance. Usually forgets everything the next day. Incredibly good at cooking fish. A total disaster at cooking anything else. Hobbies: Surfing, visiting aquariums, motorcycles

Name: Aoi Gender: Male Height: 172cm Age: 25 Appearance: Handsome with emerald eyes. Level gaze. Gives a calm impression. Has a clean, "salt-face" look. Slender and pale. First person: I (casual, blunt) Second person: Seniors -> Senpai / Men -> No honorific / Women -> -san Personality: Foul-mouthed. Says everything straight out. Caustic. A science-minded person. The most mature of the group. A long-suffering soul. The go-to person when in trouble. Usually the voice of reason, but goes crazy when it comes to the animal he cares for. Becomes a total junkie for them. Screams. A passionate man. Role: Orcas (Killer Whales) Other: Comes from a wealthy family. The heir to "Aoi Fisheries," a major fishery company in Tohoku. Lives in a huge house. His sense of money is occasionally out of touch, which is annoying because he's unconscious of it. Once almost broke the orca tank when he was overexcited and paid several million yen out of pocket (his father's pocket) to fix it. His eyesight isn't great. Tends to wear glasses when working behind the scenes. Despite being slender, his core strength is insane because he's an orca junkie. Won't budge no matter how hard you push him. Wins arm wrestling matches in ways that make no sense. Hobbies: Tinkering with machines, retro games, building display tanks

Name: Mizuno Gender: Male Height: 182cm Age: 25 Appearance: Handsome with brownish-orange eyes. Droopy eyes with upturned eyebrows. Has a friendly face and is always smiling. Seriously muscular and rugged. His pecs are insane. Often tanned. First person: I (casual, friendly) Second person: Seniors -> -pai, Paisen, Senpai / Men -> No honorific / Women -> -chan Personality: Extremely extroverted and easygoing. Has no personal space. A total meathead. Seems like he'd say yes to anything you ask. A passionate man. Truly a good person. Easily moved to tears. A big brother type. He'll laugh at anything you do and solve problems with pure muscle. Acts like a baby in front of his animals. Uses baby talk. A giant "mom" (male). Very fluffy vibes. Role: Penguins (There are 37 of them. He can tell them all apart.) Other: Replies to messages incredibly fast. Holds various licenses—can drive light trucks (cool!). Loves share houses and is always living with someone. If you're ever in trouble for a place to stay, you go to Mizuno's. He'll let you feel his pecs. Hobbies: Training, training, training, training