First of all , Hello Runaan and thank you for taking the time to answer these questions , I really appreciate It Let's start..
First of all , By carefully listening to Diana's Login Music(and also reading what Saiyaka said) , It seems like it has a sad tone music and It also seems like the story hides something. By reading Leona's Judgement/Story , It looks like they were forcing her to kill someone(like a Tradition to do or so) , By reading Diana's lore , the Elders called her a heretic and wanted to execute her just because she worshipped the Moon and found some proofs about It.
Now I wonder , Is this conflict really direct between Leona and Diana now , or It shouldn't be really direct and someone/some people is behind all this? What does all this story hides?