But we are not talking about familiars. But mages.
Oh wait~ Damn the farat boy.
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Just rememebered Yuuno's an alien so he dosn't count.
And Yuuno did tell Nanoha that she can comunicate with him as long as she has raging heart so obviously she can't control her magic on her own. My guess is Yuuno can't either but he has some artifacts with him.