Invader Ark is a female Irken Invader. She was sent to Planet Thyrax, the main planet in a random-yet-beneficial-to-conquest system.
When Zim destroyed Irk in a crazy robot rampage, Ark was on Devastis taking the test to become an Invader, and was one of the only soldiers who survived. She passed her test and moved on to become an Invader, one of the first ones in Doom Two. She modified her SIR unit, Advanced Information Retrieval Unit AIR, and built her ship, the Shadow Runner. She flew to Thyrax after an early (but still official) assigning, set up a base, and has been there ever since.
Ark is extremely loyal to the Tallest and Irken beliefs. She is very determined when given a task or when trying to hide her secrets from the Thyraxians. She is also incredibly stubborn and tough, which seems to help with her mission.
Ark has gray eyes, a tattered gray shirt, two dark gray swords, curled antennae, a pointed, black and gray PAK, spiked sleeves, and spiked boots. She is often called "short" but some other Irkens are even shorter (they're prejudiced for their height too, mostly by the Tallest).
Invader Vax- Ark and Vax are good friends.
Nightmare Vax- Ark and Nightmare Vax hate each other.
Zim- Ark met Zim on Earth when she flew there for the first time. She hates him and has tried to destroy him several times.
Dib- Ark also hates Dib.
Tak- Ark finds Tak incredibly annoying and hates her even more than she hates Dib... Which is saying something.
Nightmare Ark- They hate each other, but occasionally look to each other as friends.
Comatose- Ark is Comatose's employer, and Comatose is like a daughter to her. Ark enjoys being around her, and doesn't care that she is defective.
Fury- Ark doesn't completely trust Fury, but likes her.
SO- Ark helped build SO, and they are friends.
Ark is part of a system of secret Invaders called the Underground Invaders, and that's why not many have heard of her.
Ark's PAK is pointed because she thought that the rounded shape was too soft-looking. However, there is a circular computer in her base.
When Ark goes to Earth, she attends the same school that Zim does. She claims this is so she can figure out how to destroy him.
"Okay, we're done here. Can I go home now?"
"Oh, I'm terrified. Positively terrified."
"Friends are for weaklings. I need no one."
"Don't listen to the peasants, AIR. You know we're better than them."