Like. They were PROXY WAR-ing each other through John and Dave as their main form of interaction. They were LARPing hating the other so badly that THE second they have an excuse to drop it, they're all over each other.

LIKE AT ALL.

But this is a deeply lonely Vriska who's meeting someone who's actively willing to interact with her in good faith after having been (understandably) abandoned by everyone she cares about, it feels like a peek behind the corner of who Vriska CAN be when not having a reason to be vindictive.