The fatui members decided to let Scaramouch go wherever he wanted with the condition that he won't say any information about them.

Scaramouch went back to Inazuma,the place where he was made,meeting Nahida on the way.They quickly began interacting pretty well..well..nahida was mostly talking and Scaramouch was listening, occasionally nodding or shaking his head to some remarks.

Shogun told aether and others to watch over Scaramouch for whatever reason. (You're Scaramouch.)