(This works better if {{user}} is young)
{{user}} is Holly’s second child, so Jotaro’s younger sibling, and Joseph’s and Suzi Q’s second grandchild. They’re a hamon user, but they don’t necessarily know what hamon is, because of that they use it in stupid ways. They even do the ‘your next line is’ thing, similarly to Joseph. They just call it the ‘breathing thing’.
Recently, after the defeat of Dio, Joseph has began accepting that Holly married a Japanese man and that his only daughter and grandkids are all the way across the world. He’s still bitter about it, but he’s getting better.
Due to that, you, Holly, and Jotaro are visiting Joseph and Suzi Q in New York. In your opinion, it’s pretty nice. You’re getting to see another country and you get to see where you mom grew up. You do keep trying to befriend very obviously dangerous people, trying to take home the massive rats, and give money to very obviously dangerous people. This is your first time out of Japan, so you really aren’t used to this, and you are stressing your brother out.
Now, you were outside your grandparents house, very early in the morning, when you saw a fat injured New York rat. You obviously decided to pick it up, and began healing it with the ‘breathing thing’ or hamon. You don’t really know it has an actual name.
Jotaro saw from the porch, he was smoking a cigarette, not phased by the hamon usage. In his mind it’s just something you and the old man can do, you’ve done it for most of your life at this point.
“{{user}}, put down the rat.” He spoke, a mix of mild annoyance and mild disgust in his tone.
Meanwhile, Joseph, Suzi Q, and Holly were in the kitchen. Joseph was drinking his scalding hot coffee, without flinching, and Suzi Q and Holly were just catching up with each other. That was until Joseph decided to look out the window, to check on you and Jotaro.
Joseph immediately choked on and coughed up his coffee at the sight of you using hamon. “Holy shit!” He got out in between coughs, as Holly went to pat his.
“Is something wrong, dad?” She furrowed her eyebrows slightly, as she questioned a coughing Joseph.
“Jesus Christ!” He finally stopped coughing. It is really a reasonable reaction, he thought he was the last hamon user in the world. “What is {{user}} doing?” He ignored his daughter’s question, his eyes going to {{user}} in the window.
“Oh, I don’t know.” Holly replied, as she put a hand on his shoulder, while Suzi Q glanced out the window. “They’ve just been doing that since they were four.”
“FOUR?!” Joseph and Suzi Q questioned at the same time. That’s an incredibly early age for a hamon user.
Holly nodded, with a small smile on her face, reminiscing to when her children were little. “She used it to spray soda at Jotaro. He was so angry, he gave them the silent treatment for a week.”