Yes. Unfortunately..
i don’t think they’re actual brothers; i read in the comments that hades calls the emperor hyung in the raws so it was probably just a translation error
Erm Idk if you read the main one but there's a Betts r explanation there.
Better*
I wanted to ask the same because I am pretty sure it was said that the emperor was blaming his brother Hades thinking that he is at fault for the disappearance of Donga when he 1st fall on Earth.
I like hades more and I noticed someone in the comments said that they are brothers can someone confirm cuz I lowkey wasn't paying attention to the words