The character you seem to be thinking about is Toa Chiara, a Toa of Lightning, introduced in one of the newest BIONICLE web serials, The Yesterday Quest.

Since there is a difference between Chiara and Charia's names, I don't see why you can't use Charia. Of course, you might be thinking of a completely different character, but as far as I know, the only character named Charia is the one you are using.

-TNTOS-

Ah, YES, exactly. Thanks a bunch man. I'll continue to use Charia.

-S

Don't forget Zaria! Chiara+Zaria=Charia!