she looks 12-13 at best,if anyone think she looks 16 or something,you've never seen teen IRL
I know a 20 year old who looks younger than that. And plenty of 16-18 year olds who look about the same as Sunny in terms of body build and face. Hell, just visit a porn site and look for teens and you should even find plenty.
Read the mania: http://www.fanfiction.net/~nonexistinghero In SA2, it's Super Sonic and Hyper Shadow.