A human with the fruit would be pretty filthy honestly
But depending on how the ice works maybe it fits something like Ragnir better
If you have to touch who’s being frozen then it’s ass if you aren’t a hand-to-hand fighter like Luffy
But then the amount of goofy shit you could do with it is kinda crazy. You could permanently seal devil fruits by either freezing the user or freezing the fruit itself
The potential is endless