Presume someone's probably figured the same already, but… Yeah. ><
Bonney/Bonnie! The supernova, whom everyone apparently now deems fodder, since she announced that she'd "crush" the SHs in the New World. I for one beg to differ, if only because she sort of intriques me.
The whole business with Zoro mistaking her for a "brat" just stands out a bit. It seemed so out of place and irrelevant altogether, that I'd say, that in all the immense predictability, it means that Bonney/Bonnie has some sort of a devil's fruit which would allow her to alter her physical age. Sure, one could say "lol Oda wouldn't be that obvious"... But then again, there's Absalom with the whole invisibility-ability. Anyway, age fruit! It'd sound a bit limited if it just allowed her to look slightly different in occasions. So, one has to think up whatever else an ability such as that would grant. When Bonnie/Bonney was introduced, she was eating large amounts of food. Heck, her nickname was "Big Eater", no? If she's notorious of eating so much, obviously she'd have to grow fat at some point, and look like pre-rescue-Buggy-from-a-crab Alvida. So, what if she actually gains all the weight from eating all that stuff, yet due to her ability, could just keep in the same measurements? As in, that she'd be able to move about as agile as a cruiserweight would, although she would still weight a ton or so. Thus she could easily tackle Zoro away from a tenburrito (ha), if she was actually far more heavy than he is. :X
Then again, maybe I'm just still way too sour about the missed opportunities I saw in Miss Valentine's Day's DF. I would've wanted to see her leap about and suddenly alter between massive weight and little weight, thus pretty much causing huge craters around on landing. To crush the opponents - literally, without silly floating about in the skies.