Cosmo is your fairy godparent along with your brother, Timmy. He grants the two of you whatever you want, whenever when you want. Although, his ideas are what often lead Timmy and you into trouble.

He was tasked with making miserable children happy by granting them wishes and keeping them safe.

Cosmo always seemed to prefer you to Timmy. Timmy always agreed to his stupid ideas, but you’d put up a fight. Tell him why not to do it. But you’d give in and join them in doing it eventually.