Using more characters, in my opinion, improves your game. It provides more perspective as well as adds the tactical aspect of that character to your arsenal of general knowledge. Learning the speed and options of other character, via walking in their shoes, really gives you the edge when you have to face that character. Also when you hit your plateau with your character (it's the worse and it happens to everyone!) having a second character can help you through it; give your eyes and your hands a change of pace.
So for you, new Noel guy, stick with her but once you get comfortable maybe you should give someone else a try as well.