Afro

Afro hair is a hairstyle that Afro and his father Rokutaro (pony fro) have. For people who are trying to harm someone who has an Afro it is very difficult to pipoint their head because of all their hair. This is a great asset to have if you are always the target of everyones attacks.

Pony Fro

Basically the same thing it is shown in Episode 1 that Rokutaro is able to evade an attack from Justice due to his hair.