Pearl is impatient and is often accidentally getting himself and his friend, Diamond into trouble. He is the straight man of the comedy duo, while Diamond is the funny man. Compared to Diamond, Pearl is hasty and easily angered and, according to Diamond, always goes out of his way to complete things he has started, which reflects the virtue that he is aligned with: willpower, which also makes him associated with Agnome. Pearl is also very bossy and usually tells Diamond and Platinum Berlitz what to do.

Spoiler

For his skills, he is given the title of "Determiner".

(Source: Bulbapedia)