I think that the most enchanting thing about this is just how calm Marine looks; she seems more mature and elegant. The title is very fitting as well, as this power is a "secret".
Setting this at night or early morning makes Marine's bright colours stand out. The shading is very smooth and you used a good technique.
Marine's hands are almost perfect, it's just the pinkie finger on her left hand looks a little long, but other than that, they look great.
I would have to criticize her head though, it would probably look better if it was more circular.
Your art has improved a lot since I last looked at your gallery.
I can say that using Marine for this was a good choice, but if you were considering doing it again as Blaze, I would definitely say to give Blaze a crafty look, as if to "mirror" Marine.
Thank you so much for the critique, Pyraz!
I can admit that Marine's head and fingers don't look too proportionally correct. I think it's because I was using Manga Studio. I haven't tried using a circle for a "base", and normally, I start with circles. (well, for traditional drawings, anyway...)
A mirrored picture? hmm that sounds interesting. I haven't drawn Blaze in awhile, so I might give it a go. Blaze looking all beast with her awesome fire powers... dangit, I have inspiration.
It's rare for me to get critiques, so this was quite a surprise to see in my inbox. /o\ Thank you once again, Pyraz!