Nathanael Weaver (ウイバ・ナセナエル; Uiba Nasenaeru), who also used the false name Nathaniel Austere, was the Director of the Federal Bureau of Investigation who participated in the so-called Second Kira Case. He was among the first of Interpol's members to suspect a new Kira to be the source of the fresh killings. Nathanael has been portrayed as an activist of his work, and has made himself a major player in the case to uncover the new Kira.