Mamoru noticed the redheaded girl, too. She's someone he's seen frequently in Usagi's company when she isn't with the group of girls he's almost certain are the other senshi. He's not so bold as to ask, and would honestly rather suspect than have confirmation of. She can't be at fault for him knowing if he never asks, if she never provides him with the certainty that the friends she has outside of her usual circle are planetary guardians.

"Sailor V?"

The name sounds familiar, somehow. Was Sailor V a senshi who'd yet to make the scene or someone else entirely? And, on that note, why did she have her own video game?