<-- Inspiration for this.
Doctor Lao makes her rounds and checks up on her Seraphim pilot (Cherubim) patients. After an "incident" transporting the first pilot, the Cherubim were restricted to zero-gravity holding chambers, where their already catatonic bodies are tethered to the walls. These tethers are also double duty; they infiltrate the target's nervous system and effectively cut off all signals from the brain - "killing" them until the cables are removed.
More info on Seraphim pilots - [link]