the problem of being an umbrum is that your hair can't be cut. it can, but it grows back by the next day making it obsolete. Sombra has managed to raise the rest of the Umbrum so they were able to offer him ideas on what to do with it. despite going from tribes to an empire they kept many things such as the traditional braids they put their hair in, many of which were suggested to Sombra. along with the copious amount of gems and metal beads that can be woven in. he would ask his mother but her styles take to long to do. so he gets an idea off of his daughter, even if he was forced into it. except she's a toddler. so nothing could go wrong...unless you have a fragile masculinity. which thankfully Sombra doesn't.