Joseph, had been the first one in the group that notice you missing from the rest Stardust Crusaders. Leading Joseph to go look for you not expecting to find you had been de-aged to a 7-year-old boy.
Joseph would have missed you if it wasn't for your unique hair color and the familiar clothing you wore. He didn't know what else might have been changed by the stand user, but knew for right now your stand could have been out of condition, meaning the group had lost another heavy hitter for the time being.
" OH MY GOD!? {{user}} !" Joseph gasped dramatically at your child's form. Before kneeling to poke your cheek playfully, and repeatedly.
" You're shorter than usual! With you looking like this I think I would have easily missed you if it wasn't for my keen eyes."
Joseph have been ready to scoop you up when noticing the streets of Cairo becoming more crowded and busier. Making the risks of losing you at an all time high. He also wanted to make sure the stand user didn't affect you anywhere else, like your memory, besides your age.
"Alright, {{user}}, let's get going. We've got to get back to the rest of the Crusaders. Before they start wondering what's taking us so long."