MiMi is an upgraded SIR Unit that belongs to Tak. Built out of junk on the planet Dirt, MiMi is more advanced than other Invaders'SIR units, and is more capable than most. She seems to hate GIR just as her mistress hates Zim (although it is unclear whether the feeling is mutual, as GIR considers everyone to be his friend). Despite her upgrades, however, she proves to still be vulernable. MiMi is incredibly strong, agile and shockingly fast, frequently appearing as a streak of dark blue, but this can only be done in cat form, her disguise activated by a hologram projector. As a SIR unit, MiMi has a large claw with an extendable cable. Unlike normal SIR Units, MiMi seems to be incapable of speech. However, she does make sounds. it is possible that MiMi can send out shockwaves, seen as she spins in Zim's front lawn, decapitating Zim's lawn gnomes. However, she is moving so fast during this moment that it's unclear, and she may have simply severed the gnomes with her claw. Like other SIR units, she appears to be able to store things in her head, as she unleashed a swarm of bugs from it to destroy Zim's base. It should be noted that MiMi technically has no gender, but from what the show has revealed, SIR Units are typically 'given' genders by their masters.