The A-thingie is the "universal quantifier" symbol from logic (it gets read as "for all"). I also think it looks kind of like a witch hat, so it's doubly appropriate.
Is Sebastian the raccoon in fact a procyonid Sebastian Stan? Would it not be more appropriate for him to be a snake, going by Kappa's tumblr tags? (hee)
Or, wait, is it a reference to the Winter Soldier facepaint? That would also make sense to be a thing.
Angela is better and more thoroughly trained, and doesn't have the sloppy timing problem. Rapunzel is better than standard Bells but not exceptional relative to a random human-who-sings-a-lot.
Please do not leave paper burning unwatched; a burning fragment can easily be picked up by a minor air current (such as that caused by differences in air temperature between e.g. fire and nonfire), thereby spreading fire to anything flammable it might land on.
Unrelatedly, I suspect the reason Rapunzel takes a while to fall asleep may have less to do with nervousness and more to do with Singleplayer Related Activities.