I'd have to change things up a tad, but perhaps the Soul Gems would be the actual inspiration. Hild would probably find it to be very interesting from an intellectual standpoint. Between Ami, Urd, Washu, and any other genius with metaphysics/magical qualifications (Hello? Tohsaka-san? We need a consult...) they'd be able to cook one up for Alicia that doesn't have that flawed-by-design feature.
Usagi would have the power to make the soul gem under Rin's guidance. This will be important because then they can go on to make replacement soul gems for the rest of the Puella Magi.
But Hild would be the one to call Alicia's soul back and bind it into the soul gem, and then that to Alicia's body, because she's the only one available that can pull it off. And before that even works, Alicia's soul has to agree to this - mainly because once she does this, her soul is going to be bound to that gem forever unless it breaks. She will be like the Puella Magi - deathless and immortal. If anything happens to their body, they need only repair it through their magical abilities... Which are quite potent, as is the nature of a Puella Magi.
I wonder what Alicia's special talent would be. Homura can wind back time and has a hammer space. Madoka... Did we ever find out what Madoka's special talent was before she went Madoka-kami? (Although, thinking of it, would Madoka be the perfect person to fetch Alicia's soul?)
Ooooh, I can see that now... Instead of Hild, have Madoka be the one meeting Alicia in the twilight between life and death, just as she would have with all the other Puella Magi as Madoka-Kami, and making the offer to her...
Usagi would have the power to make the soul gem under Rin's guidance. This will be important because then they can go on to make replacement soul gems for the rest of the Puella Magi.
But Hild would be the one to call Alicia's soul back and bind it into the soul gem, and then that to Alicia's body, because she's the only one available that can pull it off. And before that even works, Alicia's soul has to agree to this - mainly because once she does this, her soul is going to be bound to that gem forever unless it breaks. She will be like the Puella Magi - deathless and immortal. If anything happens to their body, they need only repair it through their magical abilities... Which are quite potent, as is the nature of a Puella Magi.
I wonder what Alicia's special talent would be. Homura can wind back time and has a hammer space. Madoka... Did we ever find out what Madoka's special talent was before she went Madoka-kami? (Although, thinking of it, would Madoka be the perfect person to fetch Alicia's soul?)
Ooooh, I can see that now... Instead of Hild, have Madoka be the one meeting Alicia in the twilight between life and death, just as she would have with all the other Puella Magi as Madoka-Kami, and making the offer to her...