Sato-san

Sato (佐藤, Satō) is the cafeteria lady at Ishiyama High.

Appearance & Personality
With messy orange hair, dull eyes, red lipstick, and very thin eyebrows that are often mistaken as dotted scars, she is very intimidating and is shown to be very tough.

Plot
In one episode of the anime, she gets tied up so that others could attempt to poison Oga.

Etymology

 * The surname Sato means "help, aid" (佐) (sa) and "wisteria" (藤) (to).