We don't know specifically what regions they evolved in, but species seldom sprout horns for no reason. They make a pretty good sub-helmet to protect your face and eyes, and they double as a weapon should you need one. Au Ra probably developed other ways to exchange romantic gestures since kissing is sort of off the table.
For our purposes, as people without them, sure they don't make a lot of sense. We also don't have any need for them. Soulflayer trying to eat your brain out of your face would have some extra challenges to work through on an Au Ra. Something trying to eat your eyeballs would need a straw.
On the plus side: ERPers get to look forward to introducing Au Ra to new things!
For our purposes, as people without them, sure they don't make a lot of sense. We also don't have any need for them. Soulflayer trying to eat your brain out of your face would have some extra challenges to work through on an Au Ra. Something trying to eat your eyeballs would need a straw.
On the plus side: ERPers get to look forward to introducing Au Ra to new things!