— who spends hours putting up lights only to get tangled in them and storm off?
Casper is 100% tall and clumsy enough to get tangled up in string lights. He probably wouldn’t storm off. Just fall over and pout until Dee untangles him.
— who accidentally eats a whole box of christmas chocolates in one sitting?
Dee because Casper would be too busy finding a fancy plate to present them on.
— who insists on watching the cheesy hallmark christmas movie?
Dee though Casper hardly needs any convincing. He’s in favour of any reason he can cuddle up to her, plus he’ll probably think they’re educational (in terms of romance).
— who insists on playing nothing but michael buble in the few days running up to christmas?
Neither? Cas will just be enjoying Dee’s humming and singing around the house. (And besides, his christmas playlist mostly predates like... Wham’s Last Christmas.)
— who gets their presents wrapped at the mall so the other can’t go snooping?
Casper does so ever since they live together. His presents have been more neatly wrapped ever since too.
— who insists on making snow angels?
Probably Dee, she’s usually the one to show Cas how to have fun.
— who puts christmas outfits on all the pets?
Neither cause they don’t have any pets (yet) but I’m sure they would torture any kitten into a sweater together.
— do they go to family’s or have a quiet day in?
If Dee’s nona has something planned, they celebrate over there to enjoy the company (and the amaaazing food). But the days during Christmas break, when Dee’s schedule allows it, they would enjoy their quiet days in together or blending in somewhere in a big crowd like at a light-festival or other winter event.
— who insists on wearing matching ugly christmas jumpers?
I think Dee would bring up the idea of matching (disney) jumpers. The only jumper Cas would ever insist she wore, is one that has a pun on them like ‘have a tree-mendous christmas’
— who waits up until midnight to give the other their present?
Casper because it’s tradition.
— who insists on hand-made presents only, one year?
Dee, after finding out Cas had been all nervous to tell her he couldn’t really afford a fancy gift for her and without saying as much, she wanted him to feel more comfortable so insisted on hand-made presents only that year.
— who puts mistletoe on every door frame?
— who gets too drunk at the work christmas party and has to be picked up at 9:15pm?
Well, the only person who could get drunk that quickly is Casper. He really should learn to say no when bubbles are offered to him, it’s not that impolite!
— who gets angry and almost tells kids that santa isn’t real?
Casper has a habit of pointing out things that don’t make sense when he’s tired and irritated, I’m sure Santa can be his victim one day. Even if Dee would get angry, her years of media training would never allow her to say something like that. Besides, I think she still likes to believe in some of that Santa magic herself.