User blog comment:Filheinz/What has Yorick done?/@comment-4434378-20130706225109

" This, however, excludes   Evelynn, because Riot didn't want to give too much information about her lore" -Twisted Treeline page on Altars

I do believe that Eve is going to be Lucian's lover who was corrupted and has amnesia.

I also think the gun letters are simply for Light and Shadow.