Just a small note: 2 and 5 are mostly just experimental things. 2 was inspired by a note whilst 5 was more of something that happened after a sneeze. But anyway....
So i've made a few sketches of the silhouette of her weapon. Probably looks a bit familiar because its a scythe. I've thought more of her concept, and it looks like I'm setting in on having her be something that some people call a reaper. For me, reapers have always been this kind of neutral being that just collects the soul of the dead. That's their job pretty much.
So Lune is a reaper, and she pretty much lived her life collecting souls in peace, though sometimes she had to collect souls that were too "young", that is to say that someone killed someone before it was their time. Those cases weren't really fun for her, because basically, it was like someone just dumping more job on you than you were supposed to do. So when the war between light and dark started, she wasn't happy. In the end she joined the light side to make the war stop, or rather make the number of dying less.
The reason as to why she choose too fight for the light side was because necromancers, or rather those that played around with the dead were even more job for her because not only did she need to collect the essence of the newly deceased, but she also had to erase "living" corpses that had lost its original essence. Not that the light side didn't do stuff like that sometimes, but things like resurrections were often "ok" because it usually happened on a person that died to early, and happened before a reaper had collected the essence. At most you would have 7 days to resurrect that person, though resurrecting a dead person was another no no, and they fell into the same category as the "living" corpses.
