Erika had been about to respond to the 'types of partners comment', but then she's mentioning how many Precure she's familiar with and Erika's pretty sure that part of the conversation is more important. Especially once Alice is asking about how many precure were part of her team. "There's four of us now, but for a while it was just me and Cure Blossom." Of course, now that they were talking about this, Erika did realize that maybe she should've paid more attention to who previous precure were.

"Blossom's grandmother also used to be a Precure, but her powers were exhausted when she fought against the Desert Apostles decades ago."