Agent 5

Someone who goes out of their way to hunt you down in-game because they like the thrill of the hunt.

Person 1: "Yo you wanna play some Turf Wars in Splatoon 2 now?"
Person 2: "Nah fam, Agent 5's on and he gonna clap me hard with his Dynamo."
Person 1: "Yeah, Nah. I don't wanna play against a hunter"