Joker is a song featured in Persona 2: Innocent Sin. It serves as the debut song of the fictitious idol group MUSES of the game. The song was sung by Hiroko Konishi, Lisa Silverman's Japanese voice actress. The original composer and singer of the PSP remake are unspecified, but the arranger of the PSP version is credited to Atsushi Kitajoh.
The lyric strongly encourages the audiences to call the Joker whenever they feel depressed of achieving something they are incapable of. The monologue of Oracle of Maia in full content, albeit unknowingly, is recited by Lisa Silverman for spreading the prophecy to a wider populace. Also the last line of the lyric hints the transformation of Joker into Angel Joker.
This song is also performed in the Eternal Punishment universe by Muses but without reciting the Oracle of Maia.