[The confusion is thick enough that, between the girl's sudden uncertainty and Summer's own realization, something important becomes clear.]

She didn't tell you, did she. [A brief, at most vaguely humored chuckle.] She never did like to admit I exist... well. That's not really unexpected.

I should probably introduce myself. My name is Summer. Summer Adamas, doppelganger of Winter. In a manner of speaking, I'm your teammate, too; I can become a Precure just like her, except I become the shadow of malice, Dark Diamond.

[Her smirk is audible as she continues.] Pleased to meet you properly, Molly. I hope we can get along.