Well, she will obviously run into Nathan somewhere. It's inevitable. He is not good at talking to people, but obviously that kind of little thing ain't gonna stop Misa, right?

Toushirou speaks pretty good Japanese (but is not fluent), and has dead parents. While he's not exactly secretive with other Numbered and thinks any of them should know what the hell is going on, he's still got his thing about not being the best person to talk to the press due to being kind of a brat. (Also, if Misa talks to him the way she's been talking to Floweregg, he will find her fantastically annoying and this amuses me. He haaaaaaaates being treated like a little kid. Too bad he'll look like one for a few centuries.)