21⟩ Tell me how would you colleagues describe you in your previous work?
You should try to speak positively about your colleagues, while not completely ignoring possible negative aspects.
You can reply to this question with this answer:
I had an excellent professional relationship with my co workers, which gelled quite nicely with the company environment. People assisted one another. We worked as a team to solve problems and learned new skills to reach our team objectives.
I made some good friends for life, who today can vouch for me on a professional basis.