Ichigo's other sister's name is Yuzu. Anyways, aquatic hollows eh? Well, to put it bluntly, no. There are no other hollows who so far I have seen to even go near water. There are a few who can fly but none have I ever seen go into water. Think about it... every single hollow or arrancar for that matter, haven't touched the water.

Hollows like Acidwire and Fishbone D... wait the freaking minute!!! It hit me, there is an aquatic hollow. It's so obvious... the hamster hollow, none other than fat man himself, Grand Fisher! How could I possibly forget about Grandfisher? He was an aquatic hollow and capable of being on land too.

Oh, another thought came into my head, doesn't that giant halberd thing used for execution seem like Genryusai's Initial Release of his Zanpakuto's Ryuujen Jakka? I mean, it's a fire element and it looks sort of like it. Oh yeah, you've pretty much noticed that Soifon's Squad is the only squad who pretty much uses Hand-to-Hand Combat techniques. Have you seen anyother Squad who is capable of doing that?