A Japanese who fell in love with a Britannian, of the name Stadtfeld, and who was also a nobleman. With him she had two kids, Kallen and Naoto Kōzuki. After a fight, she became a servant to the Stadtfeld household, in which she always tried to look after Kallen and Naoto. She also was sentenced 20 years to jail for using Refrain. She always tried to be with Kallen to protect her.
She isn't seen again until the final episode of the second season where she is shown to have been freed and is living a normal life with Kallen in an apartment. She is presumed to have overcome her Refrain addiction. She is last seen drinking tea and waving goodbye to Kallen as she leaves for school.
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