@Moridin69 or the golems he uses to deactivate the traps which become fighting power for the dungeon, or the discussion of the three groups which is allowed to go first.
even if the hero didn't knew they sacrificed his friend, there is no way to know how he would react when one of his close friends dies. even more so since he comes from a relatively peaceful world where it's rare for people to die a unnatural dead.
@Leo80221 in this case his uncle just wants to use him as punching bag, he forbid him every luxury (changing on his mood what is considered luxury) and spent the insurance money van got from the insurance after his parents died in an accident.
@Elmithian @sjmcc13 thanks for correcting.