Mikiri

Mikiri is one of Motoko's four personalities. As a member of HiFuMi, she is often represented by the color yellow (defense).
The child-like expert in grappling and submission moves. All Mikiri wanted was to play with other children, although like a child, she can easily be scared into fainting. She appears to have the same enamored for Kannami as Motoko. A constant gag with Mikiri is that when she takes control, her body form changes (described by Motoko as a change in her muscle placement), inevitably increasing her bust size and causing anything less than a shirt (bra, bikini, etc.) to rip apart.

Yellow: A color that represents the preferred use of defense (Shu) in martial arts.

(Source: Wikipedia)