I guess this settles it then, Hoppou does indeed have Seaport-like claws under her mittens. Heck, those mittens might even be just something put on her for her own safety.
...ah, so they are. Even a tiny doll of her has huge claws.
Also, maybe part of the appearance difference is that this may be the first time in official art that we see her without a huge collar that can cover her chin.