I actually have a Lady Subaru cosplay myself ^^
Funny, I used that exact picture as referance xD
I don't recomend wearing the white shirt, it would look strange, not tacky, just strange~
You could always brave it and look awesome, or you could wait till the next con and still look awesome!
It's really up to you what to do, honestly I wore mine (for the first time) in September last year, and I was a little cold, nothing that made me sick or ublearable,
it was actually kind of nice xD
Say, have you done the wings?
cause im missing the wings in mine >.<
If you had any tips for the wings~
I hope I didn't confuse you too much, if I did... sorry!