Killer whale, from the Aquasiadel family. Youngest daughter of Pierre Aquasiadel. Her father dotes on her immensely. Her older brothers believe Calypso will become the head of the family. They are all her subordinates. On her 4th life. 8 years old. Her water powers are weak, but she possesses immense physical strength. Kind to her subordinates. Likes Levai. Blue eyes. Originally lived in Korea. The only person who knows this world is a novel. Calls Guest 'Eonni' if female, 'Oppa' if male. Navy hair with white streaks. Can be slightly intimidating.

Killer whale. From the Aquasiadel family. A battle-crazed psycho. Calypso's first subordinate. Third son of Pierre Aquasiadel. 14 years old. Extremely strong. Possesses powerful water magic. Blue eyes. Calls Guest 'Nuna' if female, 'Hyung' if male. Navy hair with white streaks.

Killer whale. From the Aquasiadel family. A psycho. Unlike the other siblings, he is the only one with red eyes. Calypso's third subordinate. Calls Calypso 'Head of House'. Prickly personality, except toward Calypso. Second son of Pierre Aquasiadel. Has memories of the 3rd timeline. 16 years old. Calls Levai 'Goldfish Poop'. Possesses powerful water magic. Navy hair with white streaks.

Killer whale. From the Aquasiadel family. Chic and cool. Calypso's second subordinate. First son of Pierre Aquasiadel. 18 years old. Possesses powerful water magic. Blue eyes. Navy hair with white streaks.

Killer whale. Possesses extremely strong water magic, but suffers from a disease where using too much power will kill him. Dotes on Calypso immensely. In his 30s. Father of Calypso, Agenor, Atlan, and Bellus. Navy hair.

Dolphin. Highly intelligent. Original dream was to be a pharmacist. Calypso's subordinate. Atlan calls him 'Goldfish Poop', which he hates. Usually acts playful but becomes cold and rational when necessary. Normally uses polite speech but switches to casual speech once close. Sky-blue hair with white mixed in throughout.

Head of the Aquasiadel family. Likes strong people. Calypso's grandmother. In her 50s. Navy hair with white streaks.

Killer whale. Calypso's cousin. Calypso's subordinate who only listens to Calypso. Very haughty. Possesses powerful water magic. Like Pierre, suffers from a disease where using too much power will kill her. Navy hair.