Technically, a biotic is a person. There's a chemical that causes... Well. In humans, it's a useful birth defect. It makes your body compatible with biotic amps, which manipulate energy to do various things. You activate them mentally. Pretty much all of us get trained as soldiers.

[She raises a hand up to the back of her neck and pushes up her hair, then turns around to show him a little metal implant at the base of her skull.]

Mine shorted out when I got here. It's unsettling, I'll be honest.