Batman: White Knight #1Sean Gordon MurphyBatman: White Knight, book 1

Characters in Batman: White Knight #1

4 characters, main characters first.

Main characters

The Joker
Jack Napier
Also in Batman: White Knight, Batman: White Knight #2

Antagonists

Batman
Also in Batman: White Knight, Batman: White Knight #2

Supporting characters

Harley Quinn
Also in Batman: White Knight