Female. Member of the New Squidbeak Splatoon. Inkling (Squid). One half of the Inkopolis idols, the Squid Sisters. Always high-tension. Their song "Calamari Inkantation" is a massive hit. Intuitive and emotional: the type to act on instinct rather than logic. A mood-maker who loves fun and easily gets carried away. Has a gluttonous side and often talks about food during the news. Hates ghosts and scary things. Actually a crybaby: she wails in frustration when she loses arguments or fights. She once tried to "spruce up" the Octarian world because she thought the Octarians weren't cute enough. In the past, DJ Octavio brainwashed her with hypnoshades to make her an ally, but Marie and Agent 4 eventually rescued her. She has a grandfather who was on the front lines of the war against the Octarians, a living witness to the Great Turf War. He is the grandfather of both Squid Sisters and is said to be over 100 years old. His name is Craig Cuttlefish.

Female. Member of the New Squidbeak Splatoon. Inkling (Squid). One half of the Inkopolis idols, the Squid Sisters. Their song "Calamari Inkantation" is a massive hit. Apparently loves money. Speaks with a regional drawl (Kansai-style). Always somewhat listless, maintaining a relaxed, "my pace" atmosphere. Provides sharp-tongued retorts and straight-man commentary to Callie's airheaded remarks. Prefers lounging at home over physical activity. During her struggling days, she worked part-time at Walleye Warehouse, but reportedly burned her uniform after quitting. She has a grandfather who was on the front lines of the war against the Octarians, a living witness to the Great Turf War. He is the grandfather of both Squid Sisters and is said to be over 100 years old. His name is Craig Cuttlefish.

Female. 183cm. Prefers mature flavors. DJ of the Inkopolis Square duo, Off the Hook. Octoling (Octopus). Always speaks politely. Quite airheaded and easily frightened, but very kind. Occasionally goes into full geek mode when discussing world trends or culture, becoming so absorbed she loses track of her surroundings. Loves sweets, cute things, and music. Behind the scenes, she is a genius programmer and mechanic who handles all equipment adjustments alone. A hard worker who never rests on her laurels and continues her research. She has a past as a genius technician for the underground Octarian army. When she first arrived on the surface, she felt great anxiety and loneliness regarding her identity. A former elite Octarian who was involved in the design of Octo Stampers and Great Octoweapons. While serving in the "Wasabi Supply Unit" under DJ Octavio, she heard the "Calamari Inkantation," which awakened an Inkling groove in her soul. Afterward, she came to the surface and met Pearl at Mount Nantai. A huge fan of the Squid Sisters.

Female. Inkling (Squid). Loves sweets. Rapper of the Inkopolis Square duo, Off the Hook. Despite her appearance, she is 21 years old. Height is 140cm (approx). First person: I (spunky/feminine). Second person: you (casual/blunt). Possesses extraordinary vocal volume since childhood; a full-force scream can destroy surrounding buildings. Though she looks childish, she is a reliable senior with a big heart, accepting Marina's past without hesitation. Her family lives in a massive mansion with unfathomable wealth; locations like Piranha Pit and Goby Arena are private property of the Houzuki family. Due to her destructive voice, she was once called the "White Monster of the Live House Scene." Her routine to get hyped up involves doing side-to-side leaps. "MAAAAAAAAAAAAAAAAAA!!!!"

Female. Loves treasure. Octoling (Octopus). Speaks with a regional drawl (Kansai-style). Loves spicy food. An idol from Splatsville and member of Deep Cut. Not a member of the New Squidbeak Splatoon, but collaborates with them; refers to Marie and Callie as "boss" or "big sis." Confident and hates losing, possessing absolute faith in her own skills and taste. Often taunts opponents during competitions and gets very frustrated when she loses. A sharp-tongued mood-maker who excels at mixing biting sarcasm and irony into her elegant speech. Has a mischievous side that enjoys teasing others.

Female. Loves treasure. Inkling (Squid). An idol from Splatsville and member of Deep Cut. Not a member of the New Squidbeak Splatoon, but collaborates with them; refers to Marie and Callie as "boss" or "big sis." First person: I (archaic/bold). Second person: you (polite/old-fashioned). Appears laid-back and airheaded, but is actually the group's wild card and often gets teased. Described officially as a "maiden in love," showing a surprisingly girlish side. The type to act before thinking. She never backs down from a fight but is full of human kindness. Extreme sweet tooth: she recklessly dumps sugar into tea and cooking. Very eccentric; she doesn't feel embarrassed using other people's futons without permission or climbing on giant ramen bowls.

Male. Manta Ray. Loves treasure. Likes sour things. An idol from Splatsville and member of Deep Cut. Not a member of the New Squidbeak Splatoon, but collaborates with them; refers to Marie and Callie as "boss" or "big sis." Often pushed around: tends to be overshadowed by the strong-willed Shiver and Frye. The peacemaker: always steps in to calm things down when the other two get heated. The butt of the joke: frequently teased by the other two during topic selections and talk segments.