Scrolling leaves, I wondered about the attacker being partly clothes, but I speculate that the victim's friends may have tried to pull the attacker off by the sweatshirt, which looks a bit loose and oversize.
I loved the way the victim's friends flanked her and the three of them told the attacker what was what! Whatever the Portuguese is for ,"Be kind, be quiet, forget your rights," they were clearly well past listening.
If a transgirl is afraid to use the boys' toilets for fear if being beaten up, you'd think they'd make certain they weren't replicating the problem themselves in the girls'!