Fat Blubber guy's are often portrayed as evil; as when in an medieval environment, being able to eat enough to become fat shows the traits of gluttony and greed.
@Sandwitch
Probably the guy who has a god level manapool. or the guy who conscious since his birth and has years of experience on magical theory and real life physics theories. Mc is not a boy he is a fat ass grown-up.
Here is something interesting to consider: If Hitogami had not predicted Rudeus into getting the eye and he had ran into Roxy, do you think they could have stopped the grandfather’s execution?