Why is Lambdadelta candy? It's because she's the Witch of Certainty. How does that even make sense?
Maria gave Battler the Halloween lollipop. Battler has this candy still on him when he wakes up amnesiac and may be the only thing that allows him to understand that the events on Rokkenjima really happened. It may also be why Maria is so well-remembered and well-spoken of in the story because the candy is a memory trigger for his memory of Maria. It's also one of the very few objects with its own picture and features in most of the games.
--
"COMMUNITY is back at 8 on the 15th. I have a good feeling about those numbers." - Damon Lindelof