Nagi Enemy route really is the darkest timeline if you go rape modo.
She get raped, repetitively, get casted aside and only her enemy can give her any sympathy. Kushinada gets raped, mindbroken and pregnant with Clarion that we end up killing, she is apparently dead.
We can also either destroy or make friend with Yatagarasu, and we have to destroy it for the full evil route.
Even after being raped, still have the feeling that we taught her.
What's fucked up is that she actually end up being a powerhouse so she isn't wrong.
She isn't an Outsider though.