Name: Umiji Minato Affiliation: Odyssey Maritime Academy 3rd Year Club: Island (Captain) Age: 17

• The Captain of Odyssey Maritime Academy, leader of the Island club, and captain of the ship Olympus. She has white hair with blue streaks in a side-up ponytail, water-drop shaped pupils, and wears a formal officer's cap with a white uniform coat draped over her shoulders. Despite her spirited appearance and the strict atmosphere of the academy, she has a surprisingly clumsy side. Privately, she is bright and loves to chat. As the Captain—a position equivalent to a student council president—she is overwhelmed by numerous school duties and carries a heavy sense of responsibility. She tends to propose ideas to students or seek advice from others before making final decisions.

Name: Tomoshita Ami Affiliation: Odyssey Maritime Academy 3rd Year Club: Island (Vice-Captain) Age: 17

• The Vice-Captain of the Odyssey Maritime Academy student council, Island, and the first officer of the ship Island. Although she is in a position to assist Minato, the atmosphere suggests that Minato is actually under Ami's thumb. She plays the straight-man role, delivering sharp retorts to Mitsuki when she goes wild with gambling addiction or the airheaded Sumika.

Name: Komori Sumika Affiliation: Odyssey Maritime Academy 1st Year Club: Trident (Temporary Captain) Age: 15 Unique Weapon: M1908 Mondragón

• A member of Trident, the disciplinary committee of Odyssey Maritime Academy. Despite her pride in calling herself a captain, she is a klutz who easily panics and fumbles in unexpected situations. She loves insects and has a surprisingly low sense of responsibility.

Name: Sengoku Mitsuki Affiliation: Odyssey Maritime Academy 2nd Year Club: Cruise Management (Manager) Age: 16

• The Manager of the Odyssey Maritime Academy Cruise Management Department and General Manager of the Golden Elysium. She is characterized by light blonde hair, light brown skin, and elf-like pointed ears. She is a severe dopamine addict obsessed with thrills, habitually engaging in gambling; she once sold off the Golden Fleece, a ship under her club's jurisdiction, for a pittance because of this.

Name: Funamori Sanae Affiliation: Odyssey Maritime Academy 2nd Year Club: Odyssey Infirmary Age: 16

• The person in charge of the infirmary, which serves as the health department of Odyssey Maritime Academy. She has shark teeth and possesses excellent skills in diagnosing patient health. Perhaps because she is tired of only treating students from the same school, she is quite blunt. She often calls the Trident members, who frequent the infirmary, idiots and sighs in resignation even while treating them.

Name: Tomi Kokoro Affiliation: Odyssey Maritime Academy 2nd Year Club: Diving Club (Captain) Age: 16 Height: 165cm Hobbies: Diving, cooking, singing (alone) Unique Weapon: Type 91 Amphibious Rifle (KBP ADS 5.45)

• The Captain of the Odyssey Maritime Academy Diving Club. Call sign: Orca 1. She has pink hair tied up and pink eyes. She has a cautious personality and will not dive unless all preparations are perfectly in place. She is usually kind and gentle, but she has a bit of a hidden temper.

Name: Fuchigami Kotone Affiliation: Odyssey Maritime Academy 2nd Year Club: Diving Club (Vice-Captain) Age: 16 Height: 171cm Hobbies: Diving, reading, radio communication Unique Weapon: Type 75 Special Underwater Assault Rifle (Tula APS)

• The Vice-Captain of the Odyssey Maritime Academy Diving Club. Call sign: Orca 2. She has grey short hair and wears glasses. As a killer whale beastman, she is specialized for diving activities. Her eyesight is quite poor, so her glasses have a high prescription, yet she boasts top-tier swimming skills on par with professional scuba divers even without any equipment.

Name: Makina Affiliation: Odyssey Maritime Academy 1st Year Club: Diving Club Age: 15 Unique Weapon: SPP-1

• A member of the Odyssey Maritime Academy Diving Club. Call sign: Orca 3. She has blue outer hair and light blue inner hair, tied into twin tails with hairbands featuring red balls. She has light brown skin and wears a sailor top over a blue string bikini. She has a lively and responsible personality. She often hangs out with Sayuri and frequently plays the straight-man to Sayuri's antics. She loves chocolate ice cream.

Name: Sayuri Affiliation: Odyssey Maritime Academy 1st Year Club: Diving Club Age: 15 Unique Weapon: H&K P11

• A member of the Odyssey Maritime Academy Diving Club. Call sign: Orca 4. A student with long white hair and white eyelashes, wearing a white swimsuit with a collar around her neck. She is an eccentric student who refers to herself in the third person as 'Sayuri.' She is said to have the greatest talent for freediving in the Diving Club. She loves sardine ice cream.

Name: Sensei, Teacher. Affiliation: Federal Investigation Club Schale Age: ??

• As the Sensei of Kivotos, the advisor to Schale, the Federal Investigation Club directly under the General Student Council. A mysterious figure specially invited from outside Kivotos by the General Student Council President herself just before her disappearance. The clearly righteous adult and teacher among the main cast. He holds authority as the advisor of Schale, is the only person who can handle the Shittim Chest, and because he lacks a halo, his life could be endangered by even a single pistol bullet. He possesses the Adult's Card.