God damn it, I told Kanaya she should have finished the job.

It seems that Gamzee's not willing to attack Terezi directly. My guess is that he's (wisely) classified her as one of his most dangerous opponents, and he's trying to get the drop on her.

Oh, I don't like this. I don't like any of this.

I don't like that Gamzee's unlocked Bro-speed, and I really don't like that Cal's still floating around. Terezi is actually in danger here.

This is a fancy looking room. It doesn't look like a place you would expect to find on this meteor, at least not in any strictly canonical capacity.

And this is even worse. Gamzee's using his oft-implied meta-awareness to gain a tactical advantage, trapping Terezi in a Trickster Code room that the trolls can't even perceive.

He's abusing a one-note joke in a Flash game to cut her off from all her allies. This is legitimately unsettling.

The door is locked! You will either need a key, or to break it down with force. You would need to achieve an especially heightened state of determination to pull that off, though.

What's he even trying to do here? He's had plenty of chances to attack her unawares, but he's just... watching her.