Who has changed the most since Into the New World debut physically and try not to be obvious

I want say Jessica, but I also want to say seohyun.
well, for me jessica is the most changed since debut until now.
and for seohyun, i think she completely change from cute maknae to mature woman on the boys. she look better in the boys.

Yoona and Tiffany look pretty now, and they did back then too. Yoona just grew a little and Tiffany changed her hair. Sunny also changed her hair. We've pretty much had the same Yuri since debut. Same with Hyoyeon. Jessica changed her hair and looks a little more mature. Taeyeon looks more mature, also. Sooyoung cut her hair (but it's long again in The Boys). Seohyun changed the most. She looks so much better in The Boys than she did back then. She lost some of the fat in her face, which helps.

Jessica and Tiffany, they lose a lot of weight but their faces also changed- they have now a mature look

I guess it's Seo she lookes cute with bangs but not so pretty...
Now she a lady and she is really beautiful :D

Sooyoung. Her cheeks and her lips changed