Is Lijie An Amisius' sister?

Lijie An and Mi An Hughes are both characters in The Concave-convex World, while Lijie An is not the sister of Mi An Hughes, because their relationship in the plot is not set as brother and sister. In the concave-convex world, the relationship between Li Lijie and Mi An Theseus is childhood friends, and they grew up together.

In the story of the concave-convex world, Lijie An and Mi An Hughes have experienced many adventures together, and they have deep feelings.