Feroya's In-verse would be a submerged volcano! So underwater power...
Like a dormant volcano. Hmm instability in the sleeping/unquelled pent up volcano!

Her hair wouldn't go into a deep blue... Unless she was deep deep into water. And that would be the twilight zone or further.
And she can breathe underwater, maybe of course.
(DON'T say Allucia! That one's blue because gentics and mermaids reflect beauty)
Pretty sure in this universe her hair is dark purple and powers are like magnum (Hitomi?)