Titan Soundkind and parasite
Might Titan Speaker have bonded with the parasite to an extent? Stockholm syndrome isn't a thing in real life,1 but if an entity was inside your head that much and for that long? Wouldn't you start losing awareness of where its consciousness ended and yours began?
Might the parasite have even been trained in sowing such discord and doubt? ("The Alliance isn't going to want you back… Good thing you've got me looking after you… I know what's best for you, after all.")
Might the two have become more like a gestalt entity over time? When the parasite was finally removed, did Titan Speaker find themself mourning it, to their horror? It was an enemy, but it defined their consciousness and sense of being for a time.
When the Titan was briefly parasitised again when fighting G-Toilet, did it feel horribly like coming home?
It was invented by a cop (not a psychiatrist) to discredit a hostage who criticised how the police had handled her situation.↩