That fellow is a thorough fool.

I can't abide that fellow.

I did wrong in trusting such a fellow.

He is not such a nasty fellow as you think.

I met a fellow traveler at the airport.

I met a fellow traveler on my journey.

He has a hail-fellow-well-met personality.

Never associate with bad fellows.

Green is associated with nature.

He felt a sense of camaraderie when he met his fellow countrymen abroad.

I guess Ichiko is a fellow rule-breaker, she's sending me a smile filled with affection for a comrade.