>"Oh, this is how it all ends, Flan flirting with herself. True love at last."

This could theoretically happen- one of Flandre's spellcards is called "Four of a Kind", which does just what it says on the tin- you temporarily have 4 Flans on-screen at the same time, all throwing bullets at you.

However, she mostly uses it for shenanigans.

"This is probably a stupid question, but . . ."