Haha fucking Oda at it again. I hope you guys all realize who Rika on the cover story is. She's the girl who gave zoro the rice balls all those years ago when he was captured on the Marine base.
@supersomeone they cant even be half brothers because portgas d. rouge couldnt also be luffys mom since she died at childbirth. the only way luffy and ace could be any kind of sibling is if roger is dragon, but i doubt that