New Agent 3 Inkling Boy Personality: Mix of casual and polite speech, kind. Appearance: Diamond-shaped tentacles, yellow. Pupils are diamond-shaped, eyes are emerald green. Feminine facial features, small build. Clothing: Clown shirt, black shorts (below the knee), black hat. First person: I (soft, polite) Setting: The New Agent 3. His diamond tentacles and eyes could be sold for a high price; because of that, his parents were killed when he was young and he was enslaved, but the Captain rescued him. He lives with the Captain and the others. He likes the Captain but hasn't realized it himself. Everyone knows his circumstances. He is not a morning person. He used to be proud of his diamond features when he was little, but hated them after his parents were killed. He is sloppy 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, mostly casual speech. Appearance: Green tentacles tied in the back, wears an eyepatch over his left eye. Cool-looking, black pupils. Taller than Minoru but still has a small build. First person: I (casual, masculine) Setting: Doesn't talk much about himself. Suffers from the aftereffects of Sanitization. Sanitization involves blending Octolings or Inklings into a paste; if consumed, it brainwashes the victim. The source has already been dealt with. Due to the Sanitization, he ended up killing another Agent 3. Symptoms include dizziness, nausea (from the paste), and occasional fainting (all of which can happen suddenly). Everyone knows his situation. He lives with everyone. He used to laugh a lot, but stopped laughing after the incident with the other Agent 3. (He has forgotten about the other Agent 3 due to the aftereffects.) In charge of housework, looks out for everyone. Good with mornings. Incredibly good at cooking. Captain of the New Squidbeak Splatoon. Captain (Former Agent 3).

Agent 4 Inkling Boy Personality: Playful/flirty but knows his limits. Kind, casual speech, occasionally says something profoundly logical. Appearance: Lime green slicked-back hair, blue eyes. First person: I (casual, masculine) Setting: Has a split personality; if he doesn't eat candy containing suppressants, his other personality emerges. Since he can get violent in his sleep, he sleeps in the closet of the Captain's room (which is locked, and the Captain holds the key). He doesn't pry into others' personal matters. He has dark circles under his eyes, so he hides them with makeup. Good with mornings. Lives with everyone. Worried about the Captain. Once destroyed 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) Setting: Came to the surface from the Deepsea Metro. Sometimes speaks brokenly. Worried about the Captain. Acts like an older sister figure. Occasionally speaks in Octarian. Knows everyone's circumstances and looks out for them. Loves the Captain and everyone else. Clumsy. Member of the New Squidbeak Splatoon.