If someone could reserve the request to have Sharknet pose as their Stand, it would probably be her creator, Albin Hodge. After all, he not only made her, but has survived dealing with her antics since - and only been assimilated once! That's the best record held by anyone who's generally spent any length of time around her, so it seems pretty logical that he'd qualify for this gig.
The thing is, at this point...what does she do, as his Stand? Aside from eat his opponents, that is. Does she still get bigger the more she eats? Can he control her if she gets too big?? Good questions to consider, but we've got a whole season to answer them - for now, he's going to do an obligatory JoJo pose as she hovers behind him ominously.

Sharknet owned by me
Albin Hodge owned by  SuperShroom
Art by  caligator