Squid Sisters

Squid Sisters is the family ship between Callie and Marie from the Splatoon fandom.

Canon
Despite their name, Marie and Callie are cousins. They were the first two idols of Splatoon, and appear in both the second and third game as idols no longer. The two are related to Cap'n Cuttlefish, who is supposedly their grandfather. Marie and Callie are agents throughout the series of Splatoon, with Callie temporarily becoming an enemy in Splatoon 2, Cap'n Cuttlefish, like his name, was the captain of their agency until he retired in Splatoon 3.

Marie and Callie have vast differences. As they are idols, they tend to disagree on plenty of things for the sake of Splatfests, Callie is more cheery and energetic, Marie on the other hand is not entirely lazy, but is majorly different than Callie energy wise, she also is frequently sarcastic. Both sisters have a different color scheme, Callie being black and pink, and in Splatoon 3, being black and green. Marie on the other hand, stays white and green throughout the games, though she changes shades of both colors.

Octo Valley
Callie and Marie are in all three story modes. In Octo Valley, Callie and Marie discover that The Great Zapfish, the source for Inkopolis's electricity, had been stolen. The two sisters go on to take back the stolen zapfish, alongside the main character, Agent 3 and other side characters. The zapfish in question, had been stolen by the Octarians, who had been at war with the Inklings for several years; due to the lack of land. The Octarians had been sent underground, and needed the zapfish, to power their own electricity. The Squid Sisters, alongside others, then go on to stop the Octarian's leader, named Dj Octavio.

Octo Canyon
Story mode for Splatoon 2 shares the same story as Splatoon. In the game, Marie come to find out that The Great Zapfish, once again, had been stolen by Dj Octavio, on top of that, Callie had been reported missing. Marie goes on to search for a new agent to take back The Great Zapfish and find Callie, that agent being Agent 4. Soon after saving several stolen Zapfishes, it is revealed that Callie had sided with the Octarianst and was brainwashed. Marie gets Callie out of her brainwashed state, and the sisters go on to defeat Dj Octavio again.

Return Of the Mammalians
Story mode for Splatoon 3 seems to be different than the previous games. The story takes place in Alterna, which is far from Inkopolis and every other setting. With Splatsville's population increasing, Inkopolis's population decreased. Callie and Marie make an appearence in this story aswell, in Splatoon 3 story mode, the idols, such as Deep Cut, are enemies for a specific amount of time. After being defeated by the main character, Deep Cut seems to switch roles, from enemies to allies. Deep Cut teams up with The Squid Sisters, to defeat Mr. Grizz, along with other side characters.

Fanon
Splatoon seems to favor canon ships such as Squid Sisters. Though, unlike their name, Callie and Marie are not sisters. As, not many of the inkling/octolings in the story, tend to reveal their relations to others. Some may like the family ship between Callie, Marie, and Cap'n Cuttle fish, more, as they are also family.

Fandom
FAN FICTION

Trivia

 * Callie and Marie's names together make Calamari.
 * If the Amiibos of the two are scanned in Animal Crossing, they will unlock Squirrel versions of themselves.