Karudio

Karudio is Sauza's partner.

~!Another horse mamodo like Umagon, Karudio was first introduced as a rival for the fire horse. At some point in the past, the team was ambushed by two allied Mamodo named Snail and Maraion, taking turns to attack Karudio, which they felt was not right. Although Karudio and Sauza defeated the two mamodo, the battle left them with a negative prejudice regarding "teamwork" and they are highly hesitant to work with others.!~

(Source: Zatch Bell Wiki)