Well, if you have the recovery power, you need the Catch. Try to look into things from Norse mythology that might be considered antithetical. Also consider how much of a refund you want the Catch to give. If your player is comfortable with a +0 Catch, you could always go with something like "Fenrir."
Also, for human form, does your player want to be able to have access to the powers all the time or is the player ok having to activate them? If the player wants them all the time, I wouldn't even use human form.
Love the berserker stunt.
Can you give a little more insight into the character's concept?