Ros

Appearance
Ros' sprite in the movie is a smug orangey creature wearing a light green hat with a black stripe and a star in the front.

Involvement
Ros is first seen in the Pool 2 scene disguised as Pirate Jittik. He shoots Jittik and after she falls to the ground, he changes from Pirate Jittik to his true self and says "Get destroyed." After this, he is not seen again until Razorback Battle, where he kills K1teenz for using the Razorback. The next scene he is involved in is Ros' Bedroom, where he is threatened by Cat with a ban hammer. He tries to shoot him and succeeds. Cat quickly uses the "Bazinga" spell which immediately heals the wound in its entirety. As Ros is about to die to Cat, GrimReap teleports in and saves him, sacrificing his own life. He appears next in the very next scene, The Final Battle. He contributes to killing Cat by shooting him once. After Cat explodes, the movie ends and Ros makes it out alive, being one of the 3 main survivors.

Trivia
Ros' sprite is taken from a random frame in the "Wander Over Yonder" intro, presumably at 15 seconds in.

The reason for Jittik being killed by Ros, disguised as Pirate Jittik is that at some point, in Cherrycord, Ros set his profile picture as Pirate Jittik and ruined the mood of the entire conversation and made Jittik uncomfortable.

Ros' "Ahoy! Long time no see, you yellow-bellied cur!" line is just "Hello! Long time no see, you weakling!" put through a pirate talk translator.