Shinji: The embodiment of Shinji Kyōkai 神示教会 is Shisha 使者.
Notes from Wikiquote
p. 140 | Shinji from September 23, 1995, the day Tomomaru Hime was designated as the Chokushi | (Note: In the religion's texts, 光 is glossed as michi rather than hikari in this context. 愛 is glossed using the kanji 偉光 as the furigana or ruby text.)