I don't think she is a tomboy, I think she is a funny, sexy woman. It's when she fakes the voice when I don't like it, because when she hasn't the time to really think things through (she is very calculating when a camera is around, always aware of it) she acts all tough, like wih the bike. She is cute, but not in a "little girl" kind of cute. By the way, I hated Jessica's little girl's voice, too.
And how come she is always training but doesn't run half of what Yoona or Seohyun do?
(I have to go, I'll come later maybe to edit thi, sorry.)