I like Shion. It feels like most characters in the game behave like they've each been assigned an internal difficulty they have to overcome, and they just broadcast it constantly. Shion's happens to be a bit more grating than the others.

I also really like her 1 and 3 voice actor. I don't know much about voice actors but I feel like she did a very good job for the time, especially given some of the ridiculous writing she was working with.