User blog comment:B214/Light Novel Volume 16 spoilers/@comment-23853100-20131029020955/@comment-1359322-20131029021956

Yes it's true, Valerie is in a comatose state because Rizevim took one of Valerie's Grails. And Gasper vows to take it back from Rizevim. Well, Valerie's brother, Marius, also took one of Valerie's Grail and left her in a state where everyone thought that she died, so Gasper when berserk and kills Valerie's brother and his allies.