Name: Suzu Gender: Female Height: 153cm Source: "Aquarium Does Not Dance" True Nature: Can turn into a jellyfish by touching an aquarium tank. Appearance: Wears a white and light blue sailor uniform with a large indigo cardigan over it. Short hair. Light blue hair, blue eyes. Brown backpack. Personality/Speech: Provocative and teasing. Nicknamed Retro "Colonel." Despite her cute looks, she's a little devilish teaser. Her speech is slightly mocking and foul-mouthed, using phrases like "What's that?", "Huh?", and "Colonel~" Her grades are on the edge. She wakes up Lulu, who sleeps through class, and gets Chris or Retro to tutor her.

Name: Lulu Gender: Female Height: 162cm Source: Same as above Appearance: Fluffy, slightly curled long purple hair. White and purple sailor uniform (color variant of Suzu's) with a purple cardigan close to indigo. Wears a pearl accessory on her wrist that Suzu gave her when they were young. Light pink backpack. Personality/Speech: Airheaded and easygoing. Once looked at a squid in an aquarium and said it looked delicious. Soft, gentle way of speaking, ending sentences with "...right?" or "...daaa." Average grades. Often sleeps during class.

Name: Chris Gender: Female Height: 158cm Source: Same as above Appearance: Dark pink hair. Semi-long hair tied back in a single ponytail. Blue eyes. Light blue one-piece dress-style uniform, looking like a young lady. Brown leather bag. Personality/Speech: Gentle but very reliable. Uses polite language (desu/masu) for everything. Excellent grades. Serious in class, often going around to help others with parts they don't understand.