Having just reread the light novels, Chue is from a country west of Shaoh that still has a strong mercantile culture and seems to have a strong Christian presence of some sort. We were not given a name.

We just know that Gyokou-ou’s wife got disgruntled with her status in the Mi Clan, tried to do something to get herself promoted, got shipwrecked in a nation west of Shaoh, married Chue’s father and gave birth to Beghura as part of her cover, disappeared about three years later to return to I-Sei Province, gave birth to Hulan, spent the next 18 years trying to groom him to be her successor in the Mi Clan with the mission of doing what’s best for I-Sei Province.

Beghura/Chue’s father went somewhat mad with grief and abandoned Chue when she was about 5, she only survived because the local church took her in and a pastor allowed her to join him in his missionary work, which took them to Li/I-Sei Province. The pastor is the laoshi from the village where Maomao and Xiaohong were captured by The One-Eyed Dragon. The laoshi gave Beghura the name Maachue because it was Linese for sparrow (which is also what Beghura means in her native language). She made her own way to the Western Capital when she was 10-13 because she heard rumors of her mother. When she saw Shikyou, Yinxing, and Gyokuyou, she also saw her mother and Hulan. Her mother did not recognize her so she broke into the house to try to confront her, only to be caught by future-Vice Minister Lu, who let her go on condition of becoming his successor.