but if they have the same dad why doesn't mashiro also meet him?
does he know he has a daughter?
It's rather clear that he's abroad, I think. Once her brother returned, she might wish to see her dad, too. If he's still alive. And since she didn't contact Ai in all those years, one can only speculate if Ai told their father of her. Fro what her mother reports, it's pretty clear that he cannot know otherwise.
i met that he never did anything to the sister and the sister is just pretending because it seems like she hates her older sister
her sister is trash for even demanding she bow down to him when thshe y first met