>>530984747
I don’t think Darumi ever let anyone in besides Takumi, she lets some details slip out here and there with comments so could be cobbled from various of those for Hiruko.

Darumi only revealed she was faking to Takumi after she accidentally let it slip while she was collapsed and in pain. If Takumi hadn’t caught that it seems like she would’ve continued to keep the act up indefinitely
>>530984930
While that is the main idea I think could have to do with it, it could also just simply be that Takumi was somehow filled with even more Hate when he killed Eito in Multiple Eito’s. Suppose after letting him live then getting screwed it just made him hate that much more and feeling like that was what allowed Eito to flourish more and be able to combine with/steal his body. But I dunno, Takumi in the kill routes killed his ass pretty soon after he pulled that shit at the end of route 0 so I feel like the levels of hate should’ve been about the same.