No sense of personal safety

Their violent potential is enhanced by rigid discipline, so that the dictates of their superiors are enacted swiftly and accurately, regardless of how inhuman such orders may seem. Scions are trained to ensure that commands are carried out with a merciless pragmatism. Moreover, their indoctrinated sense of obedience and duty overrides any instincts of personal safety.

Codex: Militarum Tempestus pg. 4