Memes have developed a useful shorthand of associating a particular character with a particular kind of statement or role.
There are my suggestions. More suggestions welcome, and feedback solicited.
Quora UX: Disaster Girl
Quora UI: Absentminded Goldfish
Quora Moderation (bot): Bot Executioner please!
Quora Moderation (human): Judge Dredd Sentance
Topic Bot: Confused man
Quora Leadership: College Freshman