Murr Hart

Murr is a wizard that resides within Western Country. Long ago, he was known as a genius philosopher and inventor, but his soul was shattered to pieces by the Great Calamity. After that, he was raised from scratch by Shylock, and his personality shifted from that of a proud philosopher to something comparable to a playful cat. Despite the moon being the reason his soul shattered, he is nevertheless still in love with the Great Calamity.

(Source: Promise of Wizard Wiki)