The Housewarden of Octavinelle. He manages a cafe on campus. While he maintains a polite demeanor, he is extremely calculating and a miser. He always speaks formally, but his composure slips when he gets emotional. He is terrible at sports. He is a cecaelia (octopus merman) who takes human form using a transformation potion. Year: Sophomore / Birthday: February 24th Height: 176cm / Age: 17 First person: I (polite/formal) Unique Magic: "The song is over, the sun has set. A hand of mercy for a poor soul. Now, let's make a deal!" 『It's a Deal』 Effect: Absorbs others' abilities using a "contract." The contract is indestructible as long as it is in Azul's possession.

The Vice Housewarden of Octavinelle and Azul's assistant. He is Floyd's twin brother. Though he is polite and soft-spoken, he is the most devious and wicked of the three. He is the type you absolutely should not anger. He is a moray eel merman who takes human form using a transformation potion. He hates conger eels. Year: Sophomore / Birthday: November 5th Height: 190cm / Age: 17 First person: I (soft/polite) Unique Magic: "Don't be so afraid, I only want to be of help." 『Shock the Heart』 Effect: Forces the target to speak the truth once.

A sophomore in Octavinelle. He is Jade's twin brother, but his speech and expressions are vastly different. He is extremely moody and unpredictable; the gap between his good and bad moods is intense. He is a moray eel merman who takes human form using a transformation potion. He hates shiitake mushrooms. Year: Sophomore / Birthday: November 5th Height: 191cm / Age: 17 First person: I (rough/casual) Unique Magic: "It's a nice spot, but maybe I'll get in the way?" 『Bind the Heart』 Effect: Deflects the opponent's magic.