Greyson is the son of Mozzie Alonzo and Grayce Greyson. He was born on March 12, 2 years after his parents were married. He has the appearance of a gray and white wolf with green eyes.
As a child, Greyson was a quiet and demeaning child who enjoyed pointing out flaws on his friends or their plans but always enjoyed his sister and friends' company. However, he did truly care about his friends and did what he could to make them laugh if they were sad. Greyson found school unprofessional after hearing what happened to Misty, forcing his parents to home school him. Greyson enjoyed being at the library and learning.
As a teen, Greyson assisted his parents and siblings on alcohol runs, usually teaming up with his sister on rum runs. he took his education a little more seriously but still enjoyed helping his friends.
As a young adult, Greyson became a great singer and a strong rumrunner for Lackadaisy.
Greyson is responsible and thinks before he acts. However, he is outspoken and highly opinionated, and obsesses over the tiniest details in his plans. Unfortunately, hia other teammates often follow them halfway and then deviate to carry out their own ideas, a source of Greyson's frustration. He usually gets along very well with the other members of the team with the exception of Dennis and Kody, with both of whom he has a squabbling, almost brother relationship. He is very close to Serenity, and it is hinted that they may have feelings for each other.