Was Ragnar Lothbrok really friends with Athelstan?

The duo never were romantic, but they always chose each other over most anyone else. Their relationship was a friendship like no other, that superseded cultures, religions, and wars. In a way, Athelstan and Ragnar were the only soulmates either had. While women never stayed, their bond always persisted.

Does Floki have a mental illness?

He's on the verge of schizophrenia. I don't know what you would call it. But he is crazy. He's gone further in his insanity now.

Does Athelstan become a Viking?

A year or so later, Athelstan has been assimilated into Viking society and lies about his Christian faith, telling the Vikings that he shares their beliefs. Athelstan is questioned by a mourning Ragnar, one of the only people who knows he is still Christian, what the Bible says about grief.