Since I see someone wants to apply for Archmage, Charoa's name should be well known in the walls, but is not often spoken of, or for very long. She is a -very- long time mage of the College as she's been around for a very, very long time. Her appearance though is rather unknown.

As for Sida, she's a regular client of the thieves guild. She's probably annoyed about 90% of the guild with her wild goose chases but at least she always pays coin.