I now think the popular character to die in 310 is Tink, not Blue. Tink is certainly a beloved character, and her death would tie into this Neverland arc. Tink is also on SpoilerTV’s list, which confirmed that one of the correct suspects is on that list.
Why Tink, though? She gets back her wings and then dies? We haven’t learned anything about her time in NL so unless it’s all through exposition, my guess is that she sticks around longer.
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"He was a lot of things to me" "The only conclusion was love"