Comment by Casual Reader on The Player Hides His Past - Chapter 127

@Lulumina I am not sure but I think that "Greed" and "Gluttony" are part of 7 great sins, "Gluttony" is about overindulgence over food and drinks. And "Greed" is about material wealth or possessions.
I hope this have been helpful.

@Casual Reader my running theory is grandfell is the sin of pride and is ether the mc previous life or has taken over the mc body to side with the humans

@phantom eyes my theory is that MC older brother is "Pride" and he tried to kill the whole family, but he left his little brother for fun.
Theory number 2 is the sister is (alive or was alive) after the family was destroyed.