Do you have a description in mind for the Volcas? 'Cause based on the name I'm picturing fire-breathing gargoyle-things XD
Edit: Posted, and tried to stay away from describing and controlling it, but let me know if something's off or if Mika's attack would've done less/more damage. You mentioned that it would take the whole group to take it down, so the way it is now, she hurt it a bit but mostly just pissed it off royally XD