I do think that could be the wrinkle. The object Robin holds most dear wouldn’t necessiarly work for Nealfire because he has no sentimental attachment to it: but the pendant…! Given his speech to Mulan in 301 about how not going after Emma was the greatest mistake/regret of his life, using the pendant she wore for over a decade and gave back to him would certainly have value to him emotionally.
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"He was a lot of things to me" "The only conclusion was love"