Parents

The next day after the Horcrux-banishing ritual, I'm ready to get my parents' new bodies. I put all the ingredients inside that ritual circle, along with the stone and the portrait. Both of them are ready.

Also, I had Sirius and Bellatrix's bodies moved from Azkaban to the Black Manor yesterday via Kreacher's help. House-elve is severely underestimated.

The bodies of Bellatrix and Sirius are also inside the circle. They are perfect. They both have the same blood and are related to both of my parents.

30 minutes after long spell-chanting later, the stones melt and encapsulate the ritual circle. The souls of my parents then exit the portrait and enter Sirius (Orion) and Bellatrix (Druella). And some 10 minutes of screaming later, two souls (Bellatrix and Sirius) exit their previous bodies and are gone.

Some 10 minutes later, Orion and Druella wake up in the modified bodies of then Sirus and Bellatrix. Sirius's body looks like a much younger version of Orion. While Bellatrix looks like a younger version of Druella. With my wand, they try their magic and succeed. The ritual is successful.

I got my parents back.