his ritual is explicitly only applicable to spirits with a Horcrux. If it could be used to resurrect any recently dead person, we would have heard of a lot more historical use of it.
Time turner back a few hours. Have her make a horcrux and then mindwipe that memory. There’s still time, but I don’t think they’ll realize it in time.
I don’t think Dumbledore will tell Harry about it. Because he believes the Horcrux ritual requires a murder as a human sacrifice. And as far as we know, he is right.
People. Snape told Moody the bone has to come from the father’s grave. In principle you could buy him a grave (if he doesn’t have one picked out) and have him sit in it while you remove one of his bones. But that might not qualify. You’ll recall that canon!Voldemort killed his father—this would give him a practical reason.
Ignoring the possibility of this occurring in the first place, your objection to her father being alive has rather a large hole:
“The flesh of his servant, willingly given; the blood of his foe, forcibly taken; and the bone of his ancestor, unknowingly bequeathed. Voldemort is a perfectionist...and he would certainly seek the most powerful combination: the flesh of Bellatrix Black, the blood of Harry Potter, and the bone of his father.”
Time turner back a few hours. Have her make a horcrux and then mindwipe that memory. There’s still time, but I don’t think they’ll realize it in time.
I don’t think Dumbledore will tell Harry about it. Because he believes the Horcrux ritual requires a murder as a human sacrifice. And as far as we know, he is right.
Ah, but will Squirrel? He already knows that Harry doesn’t think of messing around with souls as something that bad.
People. Snape told Moody the bone has to come from the father’s grave. In principle you could buy him a grave (if he doesn’t have one picked out) and have him sit in it while you remove one of his bones. But that might not qualify. You’ll recall that canon!Voldemort killed his father—this would give him a practical reason.
This could have been because Voldemort’s father was actually in a grave at the time; the ritual might not always require that.
Ignoring the possibility of this occurring in the first place, your objection to her father being alive has rather a large hole:
She has other ancestors she could use.
Have her make a horcrux by killing another human? it’s pretty clear both canon and MoR that killing somebody is necessary to make a horcrux.
I don’t think that’s compatible with moral of any of the people that want Hermione to live.
I outlined elsewhere how she could use Time Turners so that she never killed anyone other than another copy of herself.