I just had a sudden realization
WHAT IF Vaas went through with the whole path of the warrior thing like Jason did.
And if the scar he has on his head is the result of Citra trying to murder him. It is on the right side
And it’s a straight line. It definetely a slash wound, and very surely a kukri(or a machete)-like weapon.
Like something like this?
And maybe he reacted in time and got away with a scar. But not with his psyche intact. He had just most likely killed all his closest friends and/or family for Citra and to top that (pun not intented) basically forced to have sex with his own sister. That would fuck anyone up. The vision Jason has when confronting Vaas clearly suggests this:
“The first time I killed was for my sister.”
“Vaas, Vaas... who the FUCK is it going to be?! THEM or ME?!”
"He left me, the tribe, his birthright. Hoyt Volker lured him away with money. Drugs."
Vaas’ birthright, was to become the warrior Citra wanted so badly.
And looking at the way Ubisoft loves giving their characters various facial scars with usually a tragic backstory. So yeah, it seems fitting.
Also, Vaas’ unused Rakyat tattoo (which citraisafuckboy kindly reminded me of)
After Vaas got away with it, maybe Citra decided to drug the next candidate (i.e. Jason) to make sure he couldn’t fight back as in; to make sure what happened with Vaas doesn’t happen again.
That, or she already did and it still wasn’t enough to overpower Vaas.