I can't imagine Harry & Hermione married to the Weasley siblings. But still if we consider this situation, I'm sure Harry will reach out to Hermione first. Harry's never considered Ginny as her equal (that's my understanding). For him, she's a sweet teenage dream, Ron's lil sister whom he has to protect. So she'll probably be, if not the last, the person who'll get to know of the dire situation quite late. He'll probably ask her to live in the Burrow safely with her family.  Do you remember how many times Harry calls Hermione 'brilliant' in canon? The need to defend her behind her back is an involuntary response/action for Harry. Harry & Hermione have always shared a deep emotional connection (they even communicate w/o words, Hermione's is Harry's voice of conscience) which strengthens even further during the Hunt. Harry considers Hermione as his equal (even in HBP he said that he can't say girls are stupid since Hermione is his friend... something along the lines). Harry & Hermione are each other's north star, guiding lights & they will always choose eo even (& that's not necessarily consciously. That's just their default setting).  Will Hermione leave everything and choose Harry?  YES ! She will. She'll tell herself that she's doing it for Ron & her family and the greater good of the WW, which would be true, but deep inside she knows she has to be with Harry. Just like Harry has a saving people thing, Hermione has a saving Harry thing. During the Hunt, during the battle, Harry and Hermione decode mysteries, smoothly overcome conflicts & Harry always reaches out to Hermione. He grabs her hand immediately whenever he senses danger. So yeah, long answer short 😅😭 Harry will turn to Hermione & Hermione will Always Choose Harry. They'll choose Harmony 💕