I was surprised about inny for sure, but when i thought about it, it all made sense to me
What i feel is missed is however, is that by this time the protag has other people that need them, (i mean what are the chances you go through the entire succubus route before cassie fawn or bell) and that by vanishing from their lives, they will be hurting them.
also what i feel is missed is your status as a succubus, no other succubus or incubus comments on their new compatriot that somehow wasnt when they met them, no other benefits or rights are granted to the protag that would usually be kept from an outsider, and none of the companions even react to this new development, and although i chalked this down to "to be implemented in a later update", i certainly hope that there will be SOME change that can only be afforded to the player after overcoming the challenge other than "one extra battle move that is eclipsed simply by spending three irl hours grinding strength"
Viewing post in Rinny's motivations during her second route comments
Either talk her down, or persuade the queen. i personally think the line of "There are people that love and need me, like your subjects love and need you, I cant abandon them, and when i was brought here it wasnt with the knowledge that it would be for eternity." would be at the least enough to make her second guess her own assumptions of the mc.