Peach is definitely the cuddler in her and Mario's relationship; she always hugs him and makes sure he isn't hurt.
I mean, that's canon, no? She's often portrayed as being the one initiating any sort of affectionate contact with him, Mario is either characterized as kind of bashful about it or being completely caught off guard by it. I think the only time I've seen PDA more or less initiated by him is Luigi's Mansion 3.
(Hhgh it's so stinkin' cute dammit. The Mario movie better be at least, AT THE VERY LEAST half as fucking feelsy as this when it comes to them three or I'm going to riot.)
The implication seems to be that it's not that his nature isn't to be affectionate as much as maybe he's simply used to expressing it other ways, and your mileage may vary as to why this is- either because he doesn't want to impose or he's simply not used to the idea that he CAN be like this with a Princess- but he won't hesitate to go for a hug if he really wants one.
HHH I digress. I think Peach in general is characterized as being very affectionate and doting while Mario, albeit devoted, goes about it a different way, so she'd definitely be the cuddler.












