"Roxy seems to be more casual and fun-loving than Rose. She is also more sociable and open to interactions with friends. She curses a lot and uses sexual terms often. Roxy is also very sneaky, a trait which she and Rose share. The presence of these traits may or may not be a result of her drunkenness. She also seems to share Rose's interest in wizards, although she likes things that are more lighthearted. This interest reflects upon her pre-scratch self's love of wizards, suggesting that it was genuine, rather than an ironic mockery as Rose had believed."

(Taken from the Homestuck Wiki)

I'm looking for a nasally, almost preppy in a way, kind of voice. I'm not sure how to describe the voice I would want, so you can also go off of what I'm looking for and do your own!