According to "Nihon genho zenaku ryoiki" (a set of three books of Buddhist stories written in the late 8th and early 9th century, usually referred to as the "Nihon Ryoiki"), Chiko was jealous of Gyoki appointed as daisojo (head priest of a Buddhist sect) and slandered him, which supposedly caused Chiko to die of illness and descend to hell, but repentance led him to resurrection, and thus resurrected Chiko relied on Gyoki.
「日本現報善悪霊異記」によると、行基が大僧正に任じられたのを妬んで行基を誹謗したため、病を得て没して地獄に落ちたが、懺悔して蘇り行基に帰依したという。