Passage: Kirito goes to the school and meets Professor Tetsuhiro Shigemura who developed Augma, but Shigemura refuses to answer any questions. Before leaving, Kirito notices on Shigemura's desk a picture of a girl who resembles Yuna. Kirito discusses with Kikuoka Seijirou, who informs him that Shigemura's daughter, Yuna, died in SAO. Visiting Asuna's home, Kirito promises Asuna to get her memories back. Kirito encounters the hooded girl again, revealed to be Yuna. When she tells him his rank is too low, Kirito decides to level up, solo-killing as many bosses as he can with aid from Sinon and Leafa.

Question: Which Shigemura's daughter died?
Yuna