Agent 8, also referred to as Number 10,008 or Eight, is a playable Octoling and protagonist of the single-player DLC modes Splatoon 2: Octo Expansion and Splatoon 3: Side Order.

In Splatoon 2, Agent 8 can have a variety of appearances, depending on the player's choice of gender, skin color, eye color, and hairstyle, as well as their current ink color.

In Octo Expansion, their outfit consists of a black leather crop top for females or a slightly longer shirt for males with one long sleeve, a leather skirt for females or pants for males, high-heel boots for females or boots for males, and a type of neon yellow wristband on both their ankles and wrists. They can pick up Armor as well.