Irina Kisaevna (née Zivonik) was a Manticoran citizen and resident of the planet Sphinx. She was the younger sister of Aleksandr Zivonik and wife of Stefan Kisaevna. Having been widowed when her husband died from the Manticoran Plague, she moved in with her brother and his family during her sister-in-law's difficult pregnancy. She was also a friend and confidant of Scott MacDallan. (HHA2.1: TS) She and MacDallan eventually began a relationship and got married around 1520 PD. (SK3)