"During my time with Hermana at least, she was more preoccupied with saving her dad," he offers to her defense.

"After that...well, after that we were here, and at differing times- Dr. Kujo wasn't here until I was fifteen. Hermana had already married by then, and Mr. Joestar had come and gone on top of that."

Thinking about that, actually, he frowns. "...which probably means Dr. Kujo was just depressed, actually..."

That's probably a good excuse not to talk about relatives. Probably. And hey, no sense in cursing a good thing, so he'll keep the talk going. "...Would you want to know much about your older self?"