|Manga Début||Volume #5, Chapter #5|
|Anime Début||Episode #6 (1999)
Episode #6 (2011)
|English||Roger Rhodes (1999)
Kyle Hebert (2011)
Yūya Murakami (2011)
In the first part of Phase One, which is a marathon in the tunnel underneath Zaban City, he and his brothers are paid by Tonpa to taunt and crush the self-confidence of a rookie named Nicole. This shows that they have probably known Tonpa for some time and worked together with him before.
In the Fourth Phase of the exam on Zevil Island, his brother Imori stalks and attacks Killua to take his badge, but Killua easily snatches Imori's badge. Realizing that Killua is not an ordinary kid, Amori tells Umori and Imori to attack Killua together with him. Killua however quickly takes Amori hostage and forces Umori to surrender his badge, which gives Killua 3 points. He then throws Amori's and Imori's badges away because they are not his target, effectively eliminating the three brothers.
One year later, Umori and his brothers attend the 288th Hunter Exam, only to be easily knocked out together with the other applicants in the First Phase by Killua. Seeing the huge gap in abilities between him and themselves, they decide to never take the Hunter Exam again.