Studious and smart, Buck is serious but also nice, and has an A+ in school when the game begins. Buck is the nicest member of the Grunt household, with 9 nice points. He also has a good relationship with his acquaintance Jill Smith, despite the feud between his family and hers.
Overall, he gets along with his family, but is somewhat distant from Tank and General Buzz. According to his bio, his accomplishments are largely ignored by his father. He is overweight when the family is first played, and is 4 days away from becoming a teenager. He wants to be a pet stylist to the stars, although there is no such career or level in any job.
While Buck has dark blue eyes, he carries the recessive allele for grey eyes. He has short blond hair. Buck wears a red T-shirt over a yellow long-sleeved shirt, with khaki green shorts and sandals. He has the same clothing and hair color as Strangetown townieSamuel Riley.
Like Jill Smith, Buck has a hidden Popularity aspiration token which can be viewed in SimPE. Other pre-made toddlers and children have this quirk, though these children's aspirations can be changed when they become teens.
An official Maxisrecreation of Buck and his family was uploaded to the The Sims 4 Gallery on February 28, 2019, marking the 19th anniversary of The Sims. Buck is friends with everyone in his family and is close to mastering the Mental skill. He carries incomplete homework in his inventory. He will become a teenager in 13 days.