Agent 8

Although remaining mute throughout the game, Agent 8 displays aspects of his personality through subtle means. Agent 8 has a fondness for poetry, and writes one for every Memory Cake collected. Throughout these poems, Agent 8 demonstrates a yearning for life above ground, participating in Turf Wars, finding a part-time job, and dressing in clean clothes. This resolve is most strongly displayed in the final area of ​​the Octo Expansion, where repeatedly failing triggers a Jump Charge, showing Agent 8 with glowing eyes as they charge across the stage with the Calamari Inkantation motivating them. Their poems also show them to be considerably more compassionate and understanding than most of the other Octolings, wondering if the Inklings should be considered enemies, wishing they could all just get along, and feeling heartbroken that their superiors were kidnapping the Zapfish and having to refrain from saving it themselves. Agent 8 also wishes to apologize to DJ Octavio for unceremoniously abandoning the Octarians in their search for Inkopolis, as well as remembering his old Octarian friends, specifically an Octoling warrior whom Agent 8 fondly remembers, hoping that they will not think ill of his decision.

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 the Octo Expansion, their outfit consists of a black patent leather crop top for girls or a slightly longer shirt with long sleeves for boys, a skirt or pants of the same material for girls and boys respectively, high-heeled boots for girls or boots for boys, and some sort of neon yellow bracelet on their ankles and wrists. They can also pick up armor.