Hey guys, In one of my stories there's a teenage character that turns into an adult at some point, and I'm not sure about how it should be developed. He's a 14 years old boy at the beginning, and becomes a man after wearing a suit from his father. At first he's still a boy in a man's body but after a while his mind completely changes to the mind of an adult, which means drastic changes in his appearance, personality, style, goals and relationships with other characters. After turning into an adult he gets taller, serious, more mature, is constantly wearing sharp clothes like suits instead of sneakers and sweatshirts like he used to do before, loses his interests in boyish thigs, and is trying to fit in his new life. Even though these changes make sense (people change as they get older), I still feel like I'm doing a decharacterization of the character. I don't how should I make him age-up without he looking/acting like a totally different person.