Henry remained in Nigellus with Zafir to continue the talks with the Grand Magus and the Nigellus family.
It was also because they couldn't allow Amelia to see Zafir in that state. She might collapse from so much worry and anger.
Or Amelia might just be the one to declare war with the Nigellus Household if she sees what happened to Zafir.
As such, they hired the best masks craftsman in Nigellus to quickly make one for Zafir so he could hide half of his face. But it would take a long time. There were also no ready-made masks that cover only half of the face since it wasn't a common occurrence.
Amelia would be suspicious if they took too long to return especially since Zafir is almost always where Stella is.
Probably to ease his anger, the Grand Magus voluntarily made one out of magic so Zafir wouldn't have to walk around showing his burned face.
