I had a bit of Inspiration and asked myslef "what would those three look like as adults and with different body shapes?" So here ya have em!

Huey: the smallest of the trio. He didn't have much of a growth, so he's basically the group's twink. Shy, tidy,a bit flemboyant, Always fashonable and organized. Though It can be hard being the voice of reason when you often find yourslef between a massive gut and a pair huge pecs squishing you...

Dewey: he discorvered his love for the Gym and became a total jock. Show offy, Always flexing and bragging about how much he lifts. He can come off as a jerk sometimes because of his rough ways...but loves his Brothers...as long as they stay less jacked than him.

Louie: he had a MASSIVE growth spurt...both in height and weight. Despite this he's very comfortable with his weight and has no intention of losing any of It.
Lazy, warm, calm, he kinda acts like the big Bro of the group, using his soft body to provide comfort with a big hug whenever needed... though he Will use his weight and bigger size as an advantage to get what he wants and maybe even tease his Brother...yeah, a lot of gut action.

What do ya'll think?

Huey, Dewey and Louie belong to Disney
Art by me