User blog comment:B214/Question and Answers/@comment-98.26.119.147-20140112152906/@comment-16281343-20140112155613

Out of 16 volumes, there's only been 7 named characters that have died; Dohnaseek, Reynare, Katarea, Diodora, Crueserey, Shalba, Siegfried.

All are enemies. :D

In the hero's side.
 * Issei was resurrected.
 * Vali was cured of Samael's poison which is life-threatening to Dragons.
 * Sairaorg's mother regained her consciousness from a coma which has no chance of waking up. (even though she has no big significance in the story, but to me, that counts)