If anyone has a personality of blood its Giriko. His soul is filled with a such deep bloodlust and hatred that it threatens to tear arpart his very being. Whilst living in Luthe Village during the 800 years hiding form Lord Death, Giriko had to become a nice, gentle person in order to escape the DWMA's radar. However the moment this was no longer necessary, Giriko snapped back to his original persona, prefering being a alcaholic, brutal murderer to being a nice, peaceful enchanter.
For 800 years he lived as a peaceful enchanter of Luthe Village under many different persona's, using the skills he learnt as an enchanter to swap his memories and soul with those of his children living out 30 lifetimes. It can also be assumed that Giriko passed down his ability to become a chainsaw with his soul. Little is known about the time he spent working for Arachnaphobia, how he came to work for Arachne or how he became a Dark Weapon.