as promised, how winter poisons her crewmates – winter keeps a bunch of different potted plants and flowers in her room, some for decoration, others for their usefulness in medicines and… other things. if the plant is dying, she just takes the seeds and plants them in a new pot. if nothing else, then she can just buy them at the market of the next town they're in. flowers like snowdrops and anemones are poisonous when eaten and generally cause a bad time. so what winter does when someone's done something she feels deserves a punishment, is she takes one of the flowers (her favorite is snowdrop because… y'know, winter) crushes them up and slips just enough in to the person's food to make them sick. by the next day she typically gives them something to soothe their system and pats them on the back.
it should be said that she usually doesn't give them the poison the meal directly after the event. she'll wait a bit and keep them guessing when it'll come. it almost always happens within 7 days. the anticipation and worry is usually enough of a punishment on its own. when there are multiple people, she'll do them on different days. also, she doesn't actually do this too often – only when someone does something really idiotic. the threat's always there, though. this time around, she likely won't poison anyone… though they don't know that. yay psychological torture.
also, i'll edit my post to say rin's in a trenchcoat. and lol i doubt winter will be kissing anyone, the way this is going. unless someone feels like putting in the effort to woo her, she's got her hands full as it is trying to keep track of everyone.