I would say yes, personally. Though some could argue it's more covered than a bikini, it's not really the thing that's too appropriate for a 15 year old to wear in something like a crowded convention area or upload photos of to public places online IMHO.
I'm 17 in about a week and considering doing the same cosplay and even I'm not sure about doing it because of my age :/
Future Cosplays (not working on yet):
Aradia Megido - 30%
Chihiro Fujisaki - 60%
God Tier Eridan - 50%
Asuka Langley Soryu - 90%
Monobear, Touko Fukawa, FLARP Eridan, Wonderful Cat's Life!Gumi, Emmy Altava, Shinji Ikari, Yotsuba, Toro Gijinka, Cirno, Neptune