Was Ahri and Jhin in love?
In Ahri's new lore, she said that she killed a man she was in love with. She said that she loved an artist who liked to paint flowers. Sounds familiar? But what if she thought she killed him, but he actually survived but has gone crazy because of it? What if she knew it, but she killed the man he once was. If that's the case, she probably has even more guilt that she created a psychotic killer that even Shen and Zed were traumatized over.
Now for Jhin's side of the story, he probably had no memory of the experience. However, he knew he was an artist, and this near death experience made him become obsessed with death. The story said while he was in prison, he revealed nothing about his past. Maybe he doesn't know much about himself anymore.
Just a thought.