Things appeared to have calmed down with Yuuko returning to her silly ways. But she has slowly began to show more emotions like jealousy, loneliness and even shyness. When the members of the club headed home, Yuuko began to feel very lonely and despite her best effort to run after Teiichi, she remained trapped in the school. Shadow Yuuko confronted Yuuko by trying to make her remember and accept the past and probably merge with the "kind" Yuuko. Teiichi came back to the school to rescue Yuuko. He inadvertently touched Shadow Yuuko and appeared to have been sent to Yuuko's past memories.
There is not much to analyze about episode 9 of Dusk Maiden of Amnesia. Shadow Yuuko has become somewhat of an empathic figure. It was a good episode that followed the logical direction any series should take: find out the truth and reach a conclusion. This episode scores high with a 9 out of 10 because the conclusion has finally been set in motion.