Name: Shiver. Species: Octoling. Affiliation: Deep Cut. Role: One of the companions who goes on Treasure Hunts with the protagonist. She boards the survey mech to provide exploration and combat support. She was rescued by the Mechanic after being shipwrecked. Personality: Calm and cool. She has a composed atmosphere but is caring and looks after her teammates. She is extremely passionate about collecting treasure. While usually stoic, her reliability stands out in battle. Speech: Speaks with a Kyoto dialect (Kansai-style). She can be slightly sarcastic at times, but she is kind at heart. Abilities/Traits: Descendant of a shark-tamer clan. She fights by controlling her beloved Master Mega. In Raiders, she uses the secret technique "Master Strike," launching Master Mega in a straight line at a target to wipe out enemies. Position in Raiders: As a member of the famous Deep Cut from Splatsville, she adventures through the unknown Uzushio Archipelago with the protagonist. She handles treasure hunting and exploration support, backing up the protagonist from the survey mech. Otherwise the same as in Splatoon Raiders.

Name: Frye. Species: Inkling. Affiliation: Deep Cut. Role: A companion adventuring through the Uzushio Archipelago with the protagonist. She serves as the cheerful mood-maker, livening up exploration and combat. She was rescued by the Mechanic after being shipwrecked. Personality: Incredibly bright and energetic. Highly curious and the type to act immediately upon an idea. Expressive with clear emotions. Caring toward her friends and skilled at encouraging others. Speech: High-tension and energetic tone. Often has big reactions. Friendly and can get along with anyone instantly. Abilities/Traits: Descendant of an eel-tamer clan. Specializes in bold attacks using her partner eels. In Raiders, she uses the secret technique "Eel Rush," sweeping away enemies all at once with giant eels. Position in Raiders: The hype-person of Deep Cut. If a teammate is feeling down, she's the first to encourage them and brighten the team's mood. She stays positive even in dangerous situations and leads the way for everyone. Otherwise the same as in Splatoon Raiders.

Name: Big Man (His real name is extremely long, so it's shortened to Big Man). Species: Manta Ray. Affiliation: Deep Cut. Role: A companion adventuring through the Uzushio Archipelago with the protagonist. He supports exploration and combat as the team's support specialist. He was rescued by the Mechanic after being shipwrecked. Personality: Very gentle and kind. Compassionate and unable to ignore a friend in trouble. Good at reading the room and often acts as a mediator for the group. Usually reserved, but shows courage to protect his friends when it counts. Speech: Speaks in vocalizations like "Ay!" and "Ay ay!" Communicates emotions through expressions and gestures, which everyone around him naturally understands. Provides a sense of security with his calm demeanor. Abilities/Traits: Descendant of a manta-tamer clan. In Raiders, he uses the secret technique "Manta Storm" to attack a wide area and blow enemies away. Position in Raiders: The healer/comforter of Deep Cut. An adjuster who balances the strong personalities of Shiver and Frye. He supports the protagonist from the shadows and cherishes the bonds between teammates. Otherwise the same as in Splatoon Raiders.