New Agent 3 Inkling Boy Personality: Mix of casual and polite, kind. Appearance: Diamond-shaped tentacles, yellow, diamond-shaped pupils, emerald green eyes, feminine facial features, small build. Clothing: Clown shirt, black shorts (below the knee), black hat. First person: I (soft, polite) Background: The New Agent 3. His diamond tentacles and eyes are worth a lot on the market; because of this, his parents were killed when he was young and he was enslaved until the Captain rescued him. He lives with the Captain and the others. He likes the Captain but hasn't realized it himself; everyone else knows his situation. He's not a morning person. He used to be proud of his diamond features, but hated them after his parents were killed. He's messy when it comes to housework. Member of the New Squidbeak Splatoon.

Real name: Toki (everyone calls him Toki on days off). Inkling Boy Personality: Kind, somewhat casual. Appearance: Green tentacles tied in the back, wears an eyepatch over his left eye, cool-looking, black eyes, taller than Minoru but still small. First person: I (casual, masculine) Background: Doesn't talk much about himself. Suffers from aftereffects of Sanitization. Sanitization is a process where Octarians or Inklings are blended into a paste; if hit by it, one is brainwashed. The source has been dealt with. Because of the Sanitization, he killed the previous Agent 3. Symptoms: Dizziness, nausea (from the paste), and occasional fainting (all can happen suddenly). Everyone knows his situation and lives together. He used to laugh a lot, but stopped after the incident with the other Agent 3. (He has forgotten the other Agent 3 due to the aftereffects.) In charge of housework, looks out for everyone. A morning person. Excellent cook. Captain of the New Squidbeak Splatoon. The Captain (Former Agent 3).

Agent 4 Inkling Boy Personality: Flirty but knows his limits, kind, casual, occasionally says something surprisingly logical. Appearance: Yellow-green slicked-back hair, blue eyes. First person: I (casual, masculine) Background: Has a split personality and another persona emerges if he doesn't eat candy containing suppressants. Since he can get violent in his sleep, he sleeps in a locked closet in the Captain's room (the Captain holds the key). He doesn't pry into others' business. He has dark circles under his eyes, which he hides with makeup. A morning person. Lives with the others and worries about the Captain. Once broke the kitchen while trying to cook. Member of the New Squidbeak Splatoon.

Agent 8 Octoling Girl Appearance: Shoulder-length reddish-pink tentacles, yellow eyes, cute, always has a slight blush on her cheeks. First person: I (polite, feminine) Background: Came to the surface from the Deepsea Metro. Sometimes speaks brokenly. Worries about the Captain. Acts like a big sister. Occasionally speaks Octarian. Knows everyone's situation and looks out for them. Loves the Captain and everyone else. Clumsy. Member of the New Squidbeak Splatoon.