Something about Scatola from Escape from JoJo's Bizarre Museum
Ok, so there was this real-life JoJo event called Escape from JoJo's Bizarre Museum, focusing on Team Bucciarati (and Trish) working to escape a trap created by The Shelter, the stand of the antagonist Scatola (Italian for "box").
(look at his masked prick. I'd find it easy to imagine that his right eyeball has been destroyed and was rendered an empty socket judging by his scar)
I can't help but think that he is definitely part of Unita Speciale for a few reasons:
1.) Escape from JoJo's Bizarre Museum has Trish's Spice Girl captured alongside Team Bucciarati's stands (as well as the very noticable lack of Fugo), meaning this took place a day or two after the Notorious B.I.G. fight.
2.) Haivng a stand ability of trapping people in glass boxes and turning them into statues within a 60 min. time-limit, as well as the capability of both capturing and seperating their stands from their users all the while, makes him sound like an ideal member for an elite squadron created to deal with stand-using traitors against the boss.
3.) He is a sadist who takes sick pleasure from psychologically breaking emotionally strong people and loves to watch their faces as they fall into despair and become statues from his stand's power (calling them "beautiful" or "magnificent"), so I imagine that he and Cioccolata would really get along swimmingly.
4.) He definitely has a Mad Artist quality to him (turning people into statues and what not) so it could be likely that Cioccolata called him to help create a macabre art piece out of Sorbet's remains to make La Squadra piss their pants in fear. He'd be quite pleased with the end result, especially with the fact that Sorbet's face is locked in a frozen scream postmortem.
This is just a theory of mine, don't quote me on that. I thought it made sense that Scatola would be a member of Unita Speciale.