Question: jojo who is the invisible baby?
Answer: Shizuka Joestar (静・ジョースター, Shizuka Jōsutā) is a minor character featured in Diamond is Unbreakable. Shizuka is a baby found on the side of a road in Morioh by Joseph Joestar, who subsequently adopts her. Incidentally, she is a Stand User who can turn invisible thanks to her Achtung Baby.