In his head

Kris was very surprised by the change that Luna brought to his heart, he would never have thought about doing such a thing if it wasn't for her .

He first started breaking his clan's laws when he just confessed to Sira about his emotions , however what he was about to do now was bigger than anything he ever did .

He was 50 percent sure that Luna was in that state because of the dark energy she had inside of her .

Doing such a forbidden spell while having dark energy inside of her was too stupid even for her but right then she was too desperate to get the help she wanted and she ended up like this .

In the beginning Kris blamed Sira for what happened but right he just started to blame himself for this .

He could have handled the situation better than this .

He was the leader of the clan yet he just didn't do anything when she came asking for his help .