Aradia. Aradia time travels.
She’s been keeping lowkey for the longest time, last time she was seen was when Meenah was braiding Vriska’s hair, and with the shit that just went down I’m pretty sure she probably knows what to do. She knows this was a doomed timeline because if she was there when Meenah and Vriska were talking,and mentioning how Aranea’s actions were stupid and she was going to fuck everything up, she might’ve been overhearing and might have been doing shit to get stuff fixed rather than actively trying to get involved in a timeline she knew was doomed.
either that or she shows up and has the best corpse party she’s ever had