Special standard attacks will ignore hinata's mystery, it's not just fire main. Kiba w/clone, kankuro w/ puppet, naruto w/ clone etc will also hit their regular target.
That said, it's very hard to discern which normal attacks actually does this. For the fire main, it does have the clause "The skill is not subject to the defense skills of opponent." Note that this skill being ninjutsu, the stat "defense" would not have affected it anyway, so it's probably talking about skills like neji, hinata, kimimro).
Kiba/Naruto have the word "certain hit" on their special normal attack thou I can't find any relevant keyword on the puppet users.

that doesn't matter, unless he have another taunt up front (like kankuro puppet, neji etc), all normal standard attack will go toward hinata
That attack of fire main is an exception. Whether or not it SHOULD be an exception is another matter altogether, but what he describe is the current interaction of hinata mystery and fire main sleeping standard