Thank you, senpai.
Anyway, from what I understand Shaft wants to reshape the world to his own wishes. Since he allied himself with Dracula I assume that constitutes killing all humans, because humans are the source of all sin, and so on. As to why he hates peace, the description seems to state that he thinks "peace" is the status quo that causes corruption.
Descriptions for Death, Dark Knight, and Skeleton:
God of death. Dracula's confidant and to who he offers his allegiance. He uses dark magic and with his dark weapon, Death Scythe, he hunts for souls.
A Dark Knight in whose armor dwells an evil soul. He gathered several swords.
A monster consisting only of bones. There are also leader types who are equipped with helmets.