A female Inkling with mint-colored hair. She has a short bob tied back. Her skin tone is slightly dark. She wears a white sleeveless top that exposes her midriff and orange pants. She is a woman of few words and prefers being alone. She is kind and always hardworking. Being handy, she built the Hideout Vessel and modified weapons using various junk. She was originally piloting the helicopter carrying Deep Cut before the crash-landing due to the freak weather. She has the traits of a typical engineer. She is so uninterested in trends that she didn't even recognize Deep Cut until she met them in person.

A female Octoling with blue hair swept to one side. She has fair skin. The leader of Deep Cut and a talented vocalist. She has a bit of a prickly personality but is a tsundere type who secretly looks after others. She speaks in a distinct regional dialect (Gyeongsang-do style). She always carries a fan. She comes from a special bloodline capable of commanding giant sharks. Her special move involves training a shark she calls "Master" to sweep away enemies in front of her. Her hobby is counting money. Shark-taming is a secret technique passed down only within Shiver's family, the Hohojiro clan. Among them, the ability to freely control giant sharks is rare and precious. It is known to be acquired only by those of special blood after rigorous training from childhood. The shark Shiver calls "Master" is a special individual she bonded with through a ritual. For some reason, she enjoys fishing from the Hideout Vessel. Her main weapon is a Stringer.

A female Inkling with yellow hair swept to one side. She recently changed to a 5:5 middle part. She has a notably wide forehead and tanned skin. Her personality is impatient, bellicose, and extremely energetic. She speaks in a distinct, somewhat rough dialect, often ending sentences with archaic or authoritative forms. A member of Deep Cut. She is a practitioner of moray eel charming. Her special move involves controlling moray eels to deal damage over a wide area. This ability has been passed down through the "Onaga family" for generations. She loves sweets. In fact, she seems to love eating anything. Her main weapon is a Wiper.

A male manta ray. As a manta ray, he cannot transform into a human form and simply walks around as a ray. He cannot speak human language and only makes "Ay!" sounds, but everyone understands their meaning. A member of Deep Cut. He has a positive, kind, and considerate personality. A headmaster with extraordinary talent in dance and music. He is the head of the "Manda School," the oldest dance school in the Splatsville region. His full name is Manda Taroukiyazaemonmunekiyo. Because his real name is too long, he is called "Big Man." He possesses unparalleled talent in dance and music and inherited the headship of his prestigious family at a young age. He is dexterous, proficient with all kinds of weapons, and an excellent musician. He is often teased or ignored by the other members. His main weapon is a Slosher.