I was playing a game and my Karma mind controlled my opponents Volcana. Volcana then attempted to attack Hellboy. During the attack, I rolled double 1's like normal. So, who takes the damage from the double 1's: Karma or Volcana. Thanks in advance

The figure making the action/attack roll. Your Karma's attack roll was already done and over with... then Volcana became a friendly fig and you assigned her an action. It's Volcana's action, so she'd take the critical miss damage.

{By the way, if Karma would have failed the initial MControl attack (targeting Volcana) with snake eyes, Karme still wouldn't take any damage. Mind Control is a "no damage" attack (see the term in the Universe glossary), meaning it can't deal any damage to anyone, attacker or target, even on critical hits and misses.}