She also happens to be the daughter of Aquifer Rivers and Ruby Starshine, and sister of Lucie Rivers, which practically guarantees she likes to mess with people. In her case, she has a rather worrying habit of, well, setting people on fire. Especially if they have particularly flammable looking clothes, hair or beards.
Now married to Daramin of the College of Darkness, who provides all the quotient of flammable beards she's likely to need. :)