Iago

Despite Iago being an existing character from another franchise rather than being an official Invader Zim character or OC, I put him in here anyway since he's in my headcanon as GIR's best friend.

Iago is GIR's best friend and one of the two deuteragonists in The Adventures of GIR & Friends.

Personality
He is mostly loud-mouthed and a grump, but when GIR is around,hHis grumpy persona goes away and he is mostly a happy-go-lucky parrot.

Appearance
A red parrot with a yellow-orange beak and yellow eyes. He has blue tips on his wings and purple tail feathers.

Trivia

 * Though mostly angry when upset in his grumpy persona, he is also shown to cry almost every time when upset in his "with GIR" persona, along with Louise and GIR.