Paul's an easy-going sort of fellow.
2 British English old-fashioned
people that you work with, study with, or who are in the same situation as you:
Wooderson's courage earned him the respect of his fellows.
3 American English
a graduate student who has a fellowship in a university
4 especially British English
a member of an important society or a college:
She is a Fellow of the Royal College of Surgeons.