IDK, it kind of depends how you think of it.
Physical strength? She's big but she's able to be captured.
Mental strength? Not really, but I guess at least she has room to grow.
Abilities? Yes, she has fucking superpower to control some of the strongest animals who we know very little about and potentially destroy the surface world
Weapons? As far as we know, it's a doomsday-level weapon. And it's not just that she uses that weapon, but that she
is that weapon. So counting her weapon as part of her, yeah, I'd say she's possibly the strongest character, at least until we find out what Im and the Gorosei can really do. What if they have Uranus?
