People tend to forget that Black Star was born a killer. There is one person who remembers this, and he swallows his morals and uses him where he would be the most effective, and when Black Star returns stained in blood, that same person will bring him close and whisper apologies to him for condemning him to such a fate, but Black Star believes there is nothing to forgive.

He didn't think that all those years of building a perfect mask, a perfect façade, crafted well enough to fool his own partner, would be so easily ripped away within minutes. He also didn't think the person he would confide in would be Stein. [Mangaverse, post-canon. DeathStar. Warnings inside. I do not own Soul Eater.] COMPLETE