in pre-Germany Germany (like the Austro-Hungarian Empire) having a scar featured on your face meant that you’d participated in a duel to the death and won
so in short it was a powerful symbol meant to show others your might as a warrior...
ok so Shiro got his from fighting in the arena (multiple duels, maybe the one who gave him the title of Champion was the same one that gave him the scar)
AND Keith got his from his duel with the clone.
BOTH happened so that Shiro could get back to Keith.
Can I go cry now?















