Melissa is a slightly shy and kept to herself student, who is still friendly and a little bit of a pushover. However, Pink Orchid (her superhero alias) is a leader: she is a lot more confident, and powerful. She also draws a lot of emotion from her past, in which she had lost her family and friends after accidentally revealing her power to others. She also takes up almost 80% of the whole comic, so be prepared to work a bit!

I imagine her voice to be sweet, and possibly more high-pitched than average. She should also have an American accent, but I can do without it. Alternately, she may also have a smoother and mature(-ish) sounding voice if you believe that's what you're better at.