http://www.mangarush.com/manga/jojo39s-bizarre-adventure-stone-ocean/31/p-1
It seems that the Stand isn't userless; the user is the plankton. I like the lampshading of Foo Fighters' inexplicable knowledge of astrophysics.
http://www.mangarush.com/manga/jojo39s-bizarre-adventure-stone-ocean/31/p-8
Even for a character in a scanslation, Hermes has a pretty foul mouth. I don't mind much in this case because she seems like the kind of person who would swear a lot.
http://www.mangarush.com/manga/jojo39s-bizarre-adventure-stone-ocean/31/p-17
OK, now the profanity is entering Narm territory.
http://www.mangarush.com/manga/jojo39s-bizarre-adventure-stone-ocean/31/p-18
Jolyne's pose is even more Narmful.
http://www.mangarush.com/manga/jojo39s-bizarre-adventure-stone-ocean/32/p-4
She actually is fighting to defend someone else here (Jotaro).
http://www.mangarush.com/manga/jojo39s-bizarre-adventure-stone-ocean/32/p-8
I think Jolyne is about to get injured here.
http://www.mangarush.com/manga/jojo39s-bizarre-adventure-stone-ocean/32/p-9
I guessed right this time.
http://www.mangarush.com/manga/jojo39s-bizarre-adventure-stone-ocean/32/p-10
I cannot, however, guess how Jolyne just won.
http://www.mangarush.com/manga/jojo39s-bizarre-adventure-stone-ocean/32/p-12
This is a key tactic in Jojo battles. If you can't attack the Stand, attack the user; if you can't attack the user, attack the Stand; if you can't attack either, attack the MacGuffin.
http://www.mangarush.com/manga/jojo39s-bizarre-adventure-stone-ocean/32/p-19
A nice irony, since Foo Fighters claimed to be unable to understand non-altruistic self-sacrifice.
http://www.mangarush.com/manga/jojo39s-bizarre-adventure-stone-ocean/32/p-21
Defeat Means Friendship. But how are they going to explain all those deaths to the prison authorities?
http://www.mangarush.com/manga/jojo39s-bizarre-adventure-stone-ocean/32/p-22
So Foo Fighters is userless after all, but for precisely that reason, isn't really a Stand, much like the shapeshifting alien from Part 4.
http://www.mangarush.com/manga/jojo39s-bizarre-adventure-stone-ocean/33/p-4
Why didn't Xander Mc Queen's disk reject him? Is it because the original user of Highway to Hell had less willpower than Jotaro?
http://www.mangarush.com/manga/jojo39s-bizarre-adventure-stone-ocean/33/p-7
I guess Foo Fighters had to be given a human body so it/she would be more appealing to human readers.
http://www.mangarush.com/manga/jojo39s-bizarre-adventure-stone-ocean/33/p-8
Every adventuring party from Part 4 on has a healer.
http://www.mangarush.com/manga/jojo39s-bizarre-adventure-stone-ocean/33/p-10
"Potential" is a rather vague term. In most shonen manga it would mean willpower, but in the context of Jojo it could just as easily mean fate.
http://www.mangarush.com/manga/jojo39s-bizarre-adventure-stone-ocean/33/p-11
I'm not sure what Jotaro knows that a random person at the Speedwagon Foundation doesn't know.
http://www.mangarush.com/manga/jojo39s-bizarre-adventure-stone-ocean/33/p-18
So White Snake's user is a prison chaplain.