A minion classification tied to the whole party, which blocks Donut from making clockwork copies.
Princess Donut explained that Bomo is listed as a Royal Court Minion — a minion of the party rather than of her personally. To make clockwork versions of him, she would first have to switch him over to being a minion of hers alone, exactly as they did with Clay-ton and Very Sullen. She used the moment to scold Carl for not paying enough attention to how the party system works.
The ownership rule governing which minions Donut can duplicate with her clockwork ability.