other than looking tomboyish i feel like 'cool' is an attitude along with some accomplishments rather than just an aesthetic
But nice gap moe lol (you could say it's a literal gap with her tooth missing now 8D [that said must be quite painful, esp considering 'emergency dental visits' probably don't happen often, tho i'm surprised there aren't more dentists that'd be open during the night shift and such since that might happen more than the middle of the day])