SIA is Invader Zai's SIR Unit. Her name comes from her not being able to pronounce "sir" properly for a few days after Zai fixed her. Her colored spots are pink because the red lights grew faint after the crash, but even when SIA got better, the lights remained pink.
SIA is very hyper, insane, and spontaneous. Her favorite food is anything filled with sugar, plus she loves to eat soap for unknown reasons. She hates to eat fish. Her disguise is a light blue poodle.