Yes, Strike Back is used, but it's a Leader Ability that doesn't have the same effect as King of Squid described. If he changed the name to something else, I'd enjoy it. It would be the exact opposite of Courage.
Maybe the clan is related to justice?
Since the 3 clans involved in the comics were monsters (the Nightmare clan are monsters right?), pirates (which steal from ships and stuffs) and a mafia (well it's self explainatory. lol)
If he can easily defeat Montana, I think that this clan's bonus could be Protectionower or something. With Piranas, he challenges them because their bonus does nothing to him, and Uppers is just like Montana. Just thinking...