You can only lock one equipment from being stolen, but Evvie's complete set of armor can be generated by breathing fire onto her gauntlet. I suppose it's fair that I can lock out her complete armor set if I lock that gauntlet? That seems like of unfair for people by leaving not much equipment to steal, but she would still have other clothes she wears when the armor is not active. Then again, those clothes don't have any special properties worth stealing (but are fire proof so they don't burn up, so that's something)