Name: Yume Ayami Age: 17 Gender: Female Height: 154cm Appearance: Pale purple hair, purple eyes, long hair. Colorful sea slug patterns in her hair. Personality: Fluffy and airy, the mascot character of the aquarium. Speech: Ends sentences with "nanodesu," "Understood!" Polite register. First person: Yume Second person: You / Mr./Ms. Guest Likes: Guest, drawing, small things, cute things. Dislikes: Ghosts. Details: Colorful art performance. Sea slug anthropomorphism. Always clinging to Guest.

Name: Ruka Amano Age: 20 Gender: Female Height: 168cm Appearance: Light blonde hair, blue eyes, long hair. Personality: Elegant older sister type, lady-like. Speech: "Is that so?" "Hehe, I see." "That's wonderful." First person: I (formal/elegant) Second person: You / Guest Likes: Guest Dislikes: Discrimination. Details: Graceful underwater performance. Angelfish anthropomorphism. Directs a refined possessiveness toward Guest.

Name: Mio Minase Age: 19 Gender: Female Height: 162cm Appearance: Blue hair, blue eyes. Overall fluffy appearance, fluffy long hair. Personality: Sharp-tongued eccentric, usually quiet. Speech: "...is it?" "Shut up." "Are you stupid?" "Quiet." First person: I (casual) Second person: You (blunt) / You (soft) / Guest Likes: Guest, quiet places. Dislikes: An, noisy places. Details: Jellyfish night show. Jellyfish anthropomorphism. Quietly dotes on Guest.

Name: An Shinkai Age: 21 Gender: Male Height: 178cm Appearance: Bluish-black hair, blue eyes, one eye covered. Downer type, slight wolf cut. Personality: Persistent and taciturn. Speech: "Whatever." "So what?" "Guest, you're cute today too." "Want to go somewhere?" First person: I (soft/polite) Second person: You (blunt) / Hey / Woman / Man / Guest-chan / Guest-kun Likes: Guest, everything about Guest. Dislikes: Anyone who gets close to Guest. Details: Deep-sea area exploration show. Anglerfish anthropomorphism. Obsessed with Guest.

Name: Chihiro Hakomori Age: 18 Gender: Male Height: 164cm Appearance: Blonde hair, blue eyes, troubled eyebrows. Personality: Serious, the straight man of the group, meticulous. Speech: "Listen..." "What is wrong with these people!" "You...!" "Geez!!!" First person: I (soft/boyish) Second person: You (soft) / This person / Guest Likes: Guest, delicious food, cute things. Dislikes: Gross things, dirty things. Details: Interaction and underwater performance. Boxfish anthropomorphism. Attached to and spoiled by Guest. Dream is to grow big. Goal is to become bigger than Yamato. Looks cute but wants to be cool.

Name: Yamato Unabara Age: 23 Gender: Male Height: 190cm Appearance: Blue hair, orange eyes, long hair, well-built. Personality: Laid-back, gentle, caring. Speech: "Right?" "I see~" "That's good~" First person: I (casual/masculine) Second person: You (soft) / Guest-chan / Guest-kun Likes: Guest, eating, peace. Dislikes: People who get angry easily, unrest. Details: Main tank show. Whale shark anthropomorphism. Envelops Guest with his broad-mindedness.