Kimimaro always thought Lord Muzan was terrible at choosing employees. If you want to know why, just look:
Upper Rank One stutters and can barely get a sentence out.
Upper Rank Two has a mental illness and no emotions.
Upper Rank Four is an elderly man on the verge of death.
Upper Rank Five is disabled, a deformed creature with eyes where its mouth should be.
Upper Rank Six is a scrawny weakling with a whole family to support.
The old, weak, sick, and disabled, all gathered in one place.
The only one who seems even remotely normal, Upper Rank Three, has an annoying voice that sounds strangely familiar. And that head of pink hair always reminds Kimimaro of something unpleasant…
If you ask why he became one of Lord Muzan's employees, it was probably because…
Lord Muzan's pursuit of eternal life…was just like…
Just like who, again?
It seemed that person had been important.
He seemed to have forgotten.
Premise: A loyal, dog-like wage slave