He is a very young, slight fellow.
A short, slight fellow, you say, likely to be poorly dressed and a bit confused?
Jules Halpern certainly had a strong voice for such a slight and small fellow.
The final was a slight fellow in hooded monk's robe.
He was a baby-faced, slight fellow who appeared as if he didn't have to shave yet.
Nate was a slight fellow, narrow across the shoulders and back.
Noi was thirty or so, a slight, muscular fellow with a soft voice and alert dark eyes.
He was a slight fellow from New York City with intense eyes and nervous twitches.
He was a tall but slight fellow.
He was a slight wiry fellow who seemed to enjoy rushing everywhere at double speed.