The rules, in this case are pretty clear. The spell never mentions mirrors or reflections, it “summons illusory duplicates." Spell names aren’t indicative of their mechanical effect. See Chill Touch.
There’s also vampire wizard statblock that has Mirror Image on its spell list.
It would be funny if the spell just failed though.
If anobody feels like a variation on a known image macro:
I'll make a nice transparancied version and post it :)
You and Khonsi truly are treasures.