[Accelerator chalks that expression up to this just being a weird demand. Whatever, it probably isn't every day a kid is so casual about being a scientific guinea pig. He's still a bit irritated they're wasting more time on questions, better to get this over with quickly.]

An artificial esper. [And from his time in Etraya those words aren't familiar to most people, so he continues.] A human that's gone through a bunch of medical procedures to end up psychic. That's the short explanation.