Year One: Batman/Ra's al GhulDevin GraysonBatman Post-Crisis, book 155

Characters in Year One: Batman/Ra's al Ghul

2 characters, main characters first.

Supporting characters

Bruce Wayne
Also in Batman: Knightfall, Part Two: Who Rules the Night, Batman: Knightfall, Part Three: Knightsend, Batman: contagion, Joker: Devil's Advocate, Batman: Anarky, Batman: No Man's Land, Vol. 2, Batman: No Man's Land, Vol. 5, Batman/Aliens 2, Batman/Huntress: Cry for Blood, Batman: Bruce Wayne, Fugitive, Vol. 1
Ra's al Ghul