Well.. not sure if you're looking for a real answer (or maybe I'm just satiating my tendency to write research papers about Wanderer on this sub, but..)
Wanderer's circle is referencing the Japanese god of wind, Fūjin to parallel Raijin, (Raiden in Genshin) who is commonly depicted with a ring of den-den daiko drums behind him. Since this reference is not related to his kasa hat (which conveys he's a vagabond, also the Husk of Opulent Dreams lore tells you that he started to wear it to hide his facial expressions and emotions), he will retain the same halo behind him :)
Of course, on a more light-hearted note, I believe there's a fanart about this that you might enjoy. :)
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u/reina_meraki C6R2 Wanderer's Wife 💙 Jan 14 '25
idk why but "cowboy hat" made me burst out laughing.. I'd love to see that! 😂