Guardians

The Guardians are a group of two Inklings and an Octoling in the Splatoon manga. Their names are Fierce Fishskull, Jetflame Crest, and Eye of Justice respectively; they are the protectors of Sheldon's grandfather's treasure and are the main antagonists in the Adventures of Sheldon arc.

Fierce
Fierce is a male Inkling with the "Spiky-Haired" hairstyle. He wears the Fierce Fishskull, Octoking HK Jersey, and a Friendship Bracelet. His weapon is the Aerospray PG, and his ink and eye color are both cobalt yellow.

Jet
Jet is a female Inkling with the "Haircut" hairstyle. She wears the Jetflame Crest, Annaki Evolution Tee, and Sunny Climbing Shoes. Her weapon is the Dark Tetra Dualies, and her ink and eye color are both cobalt yellow.

Justice
Justice is a male Octoling with the "Afro" hairstyle. He wears the Eye of Justice, Silver Tentatek Vest, and Annaki Arachno Boots. His weapon is the Neo Sploosh-o-Matic, and his ink and eye color are both cobalt yellow.

Fierce Fishskull
Fierce is reckless, wild, and is unusually strong, as one of his main tactics involves holding onto and cracking the ground to prevent himself from being lifted up by his Booyah Bomb.

Jetflame Crest
Jet is outgoing and competitive, and like Fierce, she possesses abilities that the average player doesn't have, such as jumping higher and having a more powerful Splashdown.

Eye of Justice
While Justice is usually focused and logical, he tends to copy other people's battle strategies using the Eye of Justice, which usually leads to his detriment. This can be seen in his battle with Goggles in Volume 13.

Trivia

 * Fierce and Crest had their duties passed down to them from their grandfather, and Justice took over this duty from a fellow Octoling who was given the same plan for the future.