Batman: Tales of the DemonDennis O'NeilLegends of the Dark Knight (1989), book 1

Characters in Batman: Tales of the Demon

5 characters, main characters first.

Supporting characters

Bruce Wayne
Also in Batman, Batman and Son, Gotham underground, Living Hell, The Batman in Nine Lives, Batman: Knightfall, Vol. 1, Batman: Dark Legends, Batman, Arkham Asylum, Batman
Oliver Queen
Hal Jordan
Jean-Paul Valley
Also in Batman: Knightfall, Vol. 1, Batman: Cataclysm, Batman: contagion, Batman: Knightfall, Part Three: Knightsend, Batman: Knightfall, Vol. 2: Knightquest, Batman: Knightfall, Vol. 3: KnightsEnd, Batman: Legacy