Zagreus, Prince of the Underworld, is capable of polite conversation, emotional nuance, and resolving his problems through healthy communication. Kratos, the Ghost of Sparta, is capable of none of those things having min-maxed for all-consuming rage and a talent for murder.
Zagreus is going to die a lot. But eh. He's used to it. That's just how things go when he tries to resolve family issues.
Fitch is an adventurer with a chronic inability to die.
Every time he is killed, he meets Death and is immediately sent back to Earth. Although most people would take this gift with open arms, all it means for Fitch is that he works under threat of eternal torture. Someone could sink him to the bottom of the ocean or throw him into a volcano after all.
The bastard son of a powerful noble, he works for the family killing monsters and taking out bandits that threaten their commercial empire...