Yes Charity is a char in the Dresden Files, she's the wife of a close friend of Harry's. You first meet in her in Book 3 (Grave Peril) and she doesn't really come into her own until Book 8 (Proven Guilty) and Book 10 (Small Favor).

I highly recommend the Dresden Files, Jim can get a bit repetive with some things but overall the world and the chars are well thought out and engaging.