So.
This is what I think would happen if Stärke was in a very boring relationship with Lucid. She didn't really like him very much. Lucid didn't show her much affection, only using her as a trophy. She was still friends with TK but started developing a crush on him. And this makes Lucid furious.

[There should be a GIF or video here. Update the app now to see it.]

This is what would happen.