they should take scara into the hexenzirkel. he has the huge hat, he is stylish, interesting, very much capable of chaos, he is hot, he is a hag, he likes tea and even went on a tea party with a cute woman. he literally meets every criteria!!!!!
People from the nation that gave him a fresh start gave him that name that does not carry weight of fate placed on him (like ei choosing to give him freedom without his approval, or him being given names that label him as weird or destroyer) he's just a guy with a hat to ppl now
As silly as it is to call wan "hat guy" in lore, i think it's quite sweet that he has preferences on who gets to call him what
Cus i also struggled with my name and different ppl calling me different names is something so special to me when it comes from them
Technically, hoyo just wanted a solid name for VAs to say in dialogue like how they say "traveler" instead of your user, and they should've used a name with more aura – but I like to think that the orgins of the nickname was what made it stick in scara's story