"Good" character: Kimberley Drummond, Diff'rent Strokes (1978-86)
"Bad" character: Jill Martin, Different Strokes (1998)
Nudity?: Yes, but not full-frontal
Complex says: Another good girl who went really (tragically) bad, Plato actually looks happy in the lesbian-themed Different Strokes, which is a lot more than we can say for her last years at Diff'rent Strokes. R.I.P.