"Multiverse theory?" What even is that? [Which most likely answers her question on how familiar he is with it!

[His eyes narrow some in suspicion as soon as he glances her way. Of course, he notices the silver pin right away. He is all too familiar with that crest after all.]

And does it have something to do with you wearing the crest of the Oda Clan?

[With her being a forginer, either Nobunaga granted it to her or she took it as a spoil.]