Dorothy still had some impression of Joan, since the two had met during the first act.
Before the decisive battle of the first act, Denisha had delivered a pre-war mobilization speech at the entrance of the Mechanical Church, and at that time, a young girl had been singled out by Miss Shepherdess, and that was the youthful Joan.
At that time, the homebody witch in the church had also taken notice of this thoughtful young girl, but she didn't pay too much attention to it, because back then, Joan hadn't shown much more talent either.
However, Dorothy hadn't expected that in this second act, five hundred years later, she would still be able to see this girl she had met once before.