Carefull with the balancing - purely from the character cards, Onua and Kopaka are straight up superior to Gali, because their special abilities are better versions of hers, while having equal or better stats. Hopefully there are other mechanisms in your game that provide balance.
I hope you have a good system of keeping track of all those turns for specific card effects.
From the looks of things, in the bottom right corner of the ability, all 3 have different costs, with Gali being cheaper. This appears to work like magic the gathering with colored mana types, also, in the top right corner of the ability is another number, which I can only assume is a cooldown. Also, Onua’s ability states that ALL targets are unable to strike, this could (depending on his official ruling) include friendly characters, making him literally stall the entire match. Though we can’t be certain of this until we have actual rules.
Sincerely,
Someone who plays way too many card games.
edit:
also, he hasn’t stated that this is a one v one card game, and from the looks of things it could be up to a 6 player game, so, once again, Onua is a very different ability
While there is always room for balance changes, there’s nothing explicitly wrong that I can see, at least, until we have a full ruleset to fully understand how the game is to be played