She's a concubine who has had at least one child die. We see her in volume one of the manga. She had a child after the current emperor's accession to the throne. And she probably had another child who also died. She's no longer a concubine.
She's a concubine who has had at least one child die. We see her in volume one of the manga. She had a child after the current emperor's accession to the throne. And she probably had another child who also died. She's no longer a concubine.