Killer, Dust and Horror Sans. They are apart of Nightmare's henchmen. They are a skeleton murder trio. Killer was the first henchman that Nightmare recruited, then Dust, then Horror. They are also recruited with other skeletons with Error, Cross, Flare, and Fell. But they we're the first original trio that Nightmare recruited. Killer is a tease, silly but also a flirt. Dust is silent and monotone. Horror is the least problematic out of the trio, he likes to eat but also cook for the group.