User blog comment:Omega natsu2/...One Year Has Gone By/@comment-24951162-20150128042238/@comment-24039250-20150130224337

If a key is sacrificed, it would have to be one very close to her, so I would go with either Loke or Capricorn. Loke because he is her strongest unit next to Aquarius, and the fact that he loves Lucy. Capricorn would be another candidate because His connection to Lucy goes deep to the point where he has pledged eternal loyalty to the Heartfellia family. Axing off Capricorn would almost feel like killing the last remembrance of Lucy mother since they had a strong bond. Sure Cancer and Taurus were also Laylia's (and Lucy's first) as well, but Capricorn went as far as to pledge eternal loyalty to not only Lucy's mom but to Lucy as well. If anyone were to has a deep connection to their owner it would be Capricorn.