Rhiangar

-Aymar took credit for vanquishing something once, and now everyone thinks he's a powerful wizard.
-It's too late to stop now, so he just has to run with it.
-Lied his way into being on the Mage Council because he was just bluffing, and now he is very very afraid.
-Keeps getting requests for help, and just,,, sends other people saying it's beneath him
-Please help him. This is a plea for help.
-Has a really good poker face, and people keep interpreting his orders the way they want them to be interpreted. Through sheer luck, he's been able to continue the lie that he's a very powerful wizard. This can't last for much longer though, as people are getting more suspicious as he doesn't show any magical inclination in the slightest. Still, world's best plot armor.
-Despite his appearance, puts a lot of stock in what others think of him. Even if it doesn't show on his face or tone.
-The one who actually killed the Demon Lord finds the entire situation absolutely hilarious, and is content to sit by and watch. Getting quite interested in Aymar though, the more he watches his reactions.
-Has a "very easily bullied" personality, even if he tries to deny it.
-Feels uncomfortable when people stare at him. Has a really handsome face though, so it can't be helped.
-Really distant elven heritage to thank for his good genes. Man's in his late 30s and looks like he's still 18. Doesn't seem to have given him anything else though.
-Lowkey has a praise kink.
-Usually wears his hair in a ponytail, but has been too stressed to pay attention to that lately.

-So the one who originally killed the Demon Lord is a reincarnated hero. One of the heroes of the past who was given a second chance at life if he could slay the Demon Lord. Thing is, he's already had one life of being a hero so he wanted to live his second life without any of those obligations - which is what led to this situation. He didn't really think much about it until he started hearing rumors about this new powerful mage who'd slain the Demon Lord...