X-Blood

Vintage
Vintage is a character in the Splatoon (manga), with the mush-cut hairstyle. He wears the Fake Contacts, the Takoroka Nylon Vintage, and the Orca Hi-Tops. His weapon is the Ballpoint Splatling, and In the hero mode arc, he uses the Hero Splatling Replica

Omega
Omega is a character in the Splatoon (manga), with the banger hairstyle. She wears the Fake Contacts, the ω-3 Tee, and the Toni Kensa Black Hi-Tops. Her weapon is the Nautilus 47.

Double Egg
Double Egg is a character in the Splatoon (manga). He has the spiky-haired hairstyle. He wears the Double Egg Shades, the Custom Painted F-3, and the Amber Sea Slug Hi-Tops. His weapons are the Light Tetra Dualies.

Red Sole
Red sole is a character in the Splatoon (manga) who has the pigtail hairstyle. She wears the Squid Clip-Ons, the Annaki Blue Cuff, and the Navy Red-Soled Wingtips. Her weapon is the Bloblobber.

Vintage
At first, Vintage is a stubborn person, who doesn’t talk much and doesn’t think anyone else can be rank X. After the team blue battle he becomes supportive.

Omega
Omega seems to be a lot like Vintage, considering she doesn’t talk much.

Double Egg
Double Egg is kind of sassy, yet he is determined to make a move.

Red Sole
Red Sole is the sassiest, and silliest of the bunch.

Trivia

 * Vintage and Omega used to be on the same team as Skull (character), until Skull left to create team purple.