Character: Misa Amane
Violence?: Yep, but I'd want a heads up before anything too serious.
Flirtation?: All flirting is go, but Misa will turn down any outright propositions
Theft?: Misa doesn't really have much of anything on her to steal, unless he can manage to get the Death Note from under her corset without her noticing. I would prefer that he not steal that.
Mundane Manipulation?: sure
Illusion?: sure
Poison?: sure, though I would want to plot this out beforehand if it was going to hurt her considerably.