Rohan has a feeling that Josuke is cheating at cee-lo, and cuts off his own pinky. If he is unable to figure out Josuke's trick in the next round, he says he will pay him 2 million yen to have him use Shining Diamond to fix his finger. But if Rohan does figure it out, he says he'll take Josuke's pinky instead. He even calls Tamami to act as a mediator, having him use his Stand ability so Josuke can't play fairly the next round, either.
I brainwashed her into 
thinking that I'm her son.
غسلتُ دماغها لتعتقد أنّني ابنها
Ich habe sie einer Hirnwäsche unterzogen
und nun hält sie mich für ihren Sohn.
Le lavé el cerebro
para que piense que soy su hijo.
Le lavé el cerebro
para que piense que soy su hijo.
Je lui ai lavé le cerveau
pour qu’elle me prenne pour son fils.
Le ho fatto il lavaggio del cervello
e l'ho convinta di essere suo figlio.
Com lavagem cerebral,
fiz ela acreditar que sou seu filho.