First of all, thank you for including us o3o~ And now for asnwers!
-What's your character(s) crazy backstory for ending up at the Winter fest multidimensional hubworld? How did they get from their own comic series to this strange place?
Well, our characters can't normally travel through dimensions for the simple reason that they don't know they exist (except Alex, he knows a lot of stuff because angel XD). However, there's this tricky little witch, Ivory. She finds teasing and pranking our bunch all too amusing. So, this time she cooked up a spell that targets the subconscious, meaning dreams. Ivory is harlmess, she just wants to make a prank, so she picks the aforementioned characrers' brains while they sleep and finds The Place. Her spell allows her to send the three characters in some sort of Dreamsphere, and they end up in the Winter Fest since this is Ivory's idea of a Holiday Prank. So, Alex, Kassie and Vera find themselves behind the counter of a micrography of their favourite cafe, the latter making cakes and sweets (cooking is her expertise), Kassie selling stuff and being generally friendly and Alex... eating stuff and playing Pokemon XD. They don't really know how they ended up but they play along since it's just a dream. Or at least so they think 8'D. Plus, they kinda like owning a cafe.
-What's the strangest item for sale at their booth?
No strange items, just regular sweets and coffee. Although no one's sure what's in the Buttercup Puffs, since they've still not been invented in the regular LR universe~ All sold in reasonable prices in... Terveru currency which probably no one recognises >_>; At least we have free food XD