To further develop Sonny's character, consider adding details about his demeanor, background, or interests. For example:
"Sonny was tall with dark hair and brown eyes. He held a baseball bat up against his shoulder, a confident smirk playing on his lips that hinted at a playful bravado. The scuffed sneakers on his feet and the worn cap perched backward on his head suggested that he spent countless hours playing ball in the local park, where he was known not just for his skills on the field, but also for his loyalty to his friends. His quick wit had earned him respect among his peers, but there was a flicker of vulnerability behind his bright laughter—a hint that he carried the weight of expectations, striving to prove himself both as a player and a friend."
This added description provides insight into Sonny's personality, relationships, and potential struggles.