John Constantine (Earth-9)

"Yeah, well, if you'd trusted me instead of burning me to Constantine. You blew my chance to get Two-Face. You came out on top. That's all that mattered to you."

- Jinx and Dick Grayson

John Constantine is an associate of Dick Grayson.

Jinx Affair
During Dick Grayson's investigation of Two-Face, Jinx did something that ruined his chances of catching the villain, resulting in Grayson handing her over to John Constantine.