Oh right before I forget! There was actually some inconsistency in differentiating between the brother and the dad icon. For example in Chapter 3, it's clear that the father has a "star" shape on his forehead, yet his normal icon has a scar on his face, not the "star" shape. The scar face icon most likely belonged to the brother as seen in Chapter 2 CG.
Basically, I just wanna point out that the dad icon is actually the brother icon as well lol.