fresh-faced
US /ˈfreʃ.feɪst/
UK /ˈfreʃ.feɪst/

1.
having a healthy, youthful, and innocent appearance
:
•
The new recruits were all fresh-faced and eager to learn.
•
Despite her age, she still had a remarkably fresh-faced appearance.
having a healthy, youthful, and innocent appearance