Here's the names of the characters from left to right.
The Muralist: he's Polynesian, carries around his Gatling gun to paint beautiful pieces of background art, and if you happen to get in the way you'll be part of the piece.
The Pillager: he ninjas himself across the field to where the enemy is and steals all of their spare ammo then he fills his bombs and hits you when you least expect it.
The Perfectionist: she always waits till the last minute to strike, and takes her time to find the perfect spot to snipe from.
The Curator: the head honcho of the group. He organizes the fights and always puts on a good show.
The Tagger: this guy is quick and efficient. He gets in, shoots the hell out of you and then runs away.