In Sword Art Online: Ordinal Scale, Shigemura is the creator of Ordinal Scale and is trying to recreate his dead daughter Yuna as an AI. Now, during the movie, we see two versions of Yuna. The first one wears an idol costume and appears at event battles to sing (I will call her "idol-Yuna"). The second one wears a hoodie and appears to Kirito to point him in the right direction (I will call her "hoodie-Yuna").
By the end of the movie, I was under the impression that idol-Yuna was a throwaway data collection AI created by Shigemura. I thought that her purpose was to collect information so Shigemura could create hoodie-Yuna, who would be the true recreation of his daughter. However, in discussions and reviews other people have told me that idol-Yuna was the daughter AI, and that idol-Yuna and hoodie-Yuna were the same.
Were there two different Yuna's, a data collection program and a copy of the daughter? Or was there one Yuna and she only changed appearance?