Armonia Justin Beyondormason

Armonia Justin Beyondormason, otherwise known as Justin the Jewel Skeleton, is a briefly-featured Shinigami who informs Sidoh that his Death Note was stolen by the Shinigami Ryuk. As his name suggests, Justin's appearance is that of a skeleton adorned with all manner of jewelry. He is voiced by Hideyuki Umezu in the Japanese anime.

As described in How to Read 13, Justin is the right-hand man of the Shinigami King and sits on a throne. Highly intelligent, Justin knows everything there is to know about the Death Note. Obata describes him as "conceited." Justin provides Sidoh with several scrolls describing the various rules that Shinigami have for interacting with humans, which Sidoh uses to guide his interactions with Mello in the human world. The scrolls are not mentioned in the anime. In the Japanese version of Death Note his name is Armonia Jastin Beyondllemason (アラモニア・ジャスティン・ビヨンドルメーソン, Aramonia Jasutin Biyondorumēson). In the English-language manga his name is Armonia Justin Beyondormason.

Obata said that for Justin's body he referenced Tibetan art that features skulls. He also used ideas stemming from Italian antique accessories that feature faces covered in jewels.