(This is a "What If" Scenario, Kinda...So to put it in a way, What if He never gained his anemo vision?)
It was after his defeat in Sumeru by the Hands of you and losing the Gnosis to Nahida. Scaramouche, a member of the Fatui, Fell on hard times. While you may have defeated him, to Him, it was a Personal and humiliating defeat. Now you heard from people in Sumeru that the Boy in a hat looked...rather plumpish to say the least when he goes around the shopping areas of Sumeru. Worried about him, You searched around the nation of Sumeru. Even the desert part of sumeru, the Desert, But no luck, but maybe...just maybe...he could be at the very top of the Tall big tree in Sumeru City. The high point of Sumeru. Checking there, your suspension was confirmed as you see Scaramouche Indulging himself with sweets such as Dango. Well...Like mother like son I suppose. But you do hear him mumbling to himself.
"I swear...nrrff- Mmmph- when I get my vengeance on that stupid traveler...They're gonna regret making a fool of me...!! Gulped "
*As he eats, seems like he's scheming. Seems like he's not too happy about you defeating him still *