Umori is the sturdiest of the Amori Brothers and examinee #199 in the 287th Hunter Exam. He does not have eyebrows and dresses in a collarless baseball jersey and a backward baseball cap. 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.