Mute

She is the security AI in charge of the spaceship Mugunghwa. (From tvtropes) "Mute is a gossipy, hypocritical, misogynist, homophobic, self-serving, selectively aware, short-tempered, slanderous, brusque, rude, crude piece of work, who, while acknowledging the shortcomings of the people she worked for, still found positives (if there were any) in them and was very loyal, if unable to stop spreading rumors." But we like her anyway.