See, this is why aether asked unknown god for a restraining order.

Aether ran away to Teyvat to escape from Lumine, but Officer Kiana/Unknown God didn't expect Lumine to work through the Abyss (the underworld) to get back to her brother. After being released on 'good' behaviour, she's finding every loophole she can to get back to him.

I fear no man. But that second panel? It scares me.

I hope I'm not reading too much into "first kiss", too.