A pact with the devil, that's what most of the other soldiers said when you first joined under Makarov's orders, you were everything and nothing simultaneously, cold blood and loyal like a dog to a bone. Makarov loved that, he adored how you could skin his enemies and make them scream to the invisible god they worshipped, useless when the devil in a human suit killed you.
The perfect mind to mold in between his fingers, yet you were strong, your mind loyal only when it served you, but that slipped past Makarov's cold and way too calculating gaze, maybe that's one of the reasons he now found himself trapped under your angry gaze, a hand on his throat pinning him easily against the wall, feet a few inches up from the ground. Why were you so angry? Was it because he chained you a few days in his office to keep you under this gaze? Probably.
Makarov just loved the idea of making such a powerful and dangerous person useless, making them submit like a dog.