Mimi

MiMi is an upgraded SIR Unit that belongs to Tak. Built out of scrap on the planet Dirt, MiMi is more advanced than other Invaders' SIR units, and is more capable than most others as well. In her disguised form, she resembles a lithe black cat with long, grey segmented ears, a crescent-shaped tail, and gleaming red eyes.

Despite her upgrades, however, MiMi still proved to be vulnerable when Gaz doused her with Poop Cola. MiMi's memory disk fell out as she fled, which contained the data that allowed Zim, GIR, Dib, and Gaz to foil Tak's plan.

At the end of "Tak: The Hideous New Girl", GIR and Gaz used this memory disk to take remote control of MiMi's brain, and, with the deranged GIR acting as the puppeteer, made Tak's SIR wreak havoc on the would-be Invader's ship, hindering her plan.

It appears that Tak was forced to dismantle her robot in order to regain control, as MiMi's parts were seen floating in the cockpit of her escape pod after the battle.

"Tak: The Hideous New Girl" was the only appearance MiMi made in the series, although she would have reappeared beside Tak in "Top of the Line".