Basically, if your character is PSY sensitive or susceptible to mental manipulation: write your character's name down. What will happen is your character will go through attacks of depression, feeling of emptiness and, nihilism, and enui which will last for some time (Depends on how long the player wants it to.)
Xenos is a hive-mind, he's more suseptible to mental/spiritual inputs and has a "open channel" to that kind of thing.
Nemexia is more or less designed for it! :D
Living the dream, or dreaming the life?
Akemi is extremely sensitive to emotion specifically, but anything too bad gets filtered out by Asami, so unsure. Not to mention her reactions are just kinda weird in general.
Since technopathy is technically a form of telepathy, Aiko might be somewhat sensitive too, but depends on what it is and how it's transmitted.