Memetic
MC's capabilities here are beyond the level of just a graduate school engineer. Being able to comprehend Dr. Kuroi's work at just a glance and being able to grant emotions with some minor tweaks means that he's actually got some mad scientist superpowers of his own. Maybe it's from testing his superpower enhancers, since they work on humans.
It feels like this is foreshadowing for the hero party to eventually show up. Maybe even that first returnee is the Hero?
I didn't expect this to turn into one of those doujin.