But that's against the rrrurrrus!
One of the two demon
sisters who are the primary antagonists in Gainax's new anime Panty and Stocking with Garterbelt
She is fairly conservative in her attire, though both the sisters wear brown uniforms. She refers to her sister, Scanty, as "Onee-sama" or "Onee-san" translated as "Dear Sister" while Scanty always refers to her as "Kneesocks-san" (Ms. Kneesocks)
While she is usually calm, she can fly into rage that causes her to turn bright red. When informed of this she claims that she "blushes easily" and returns to her normal demeanor.
Like her sister, she has a preoccupation with rules (said in the anime as "rrrurrrus", becoming a recurring joke among fans)
Kneesocks: And her sister, Kneesocks!