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

I met a fellow traveler on my journey.

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

We should always strive to be kind and compassionate towards our fellowman.

Not at all, that's perfectly fine. Calling each other by one's given name is a good thing; it produces a feeling of fellowship.

She received a travelling fellowship to study abroad.