Below is a chat between me (Mundyne), #Alphyne, of course! ;P Some of these answers might surprise you! ;)
By the way, if you haven't yet, follow Fyru already! What are you waiting for?!
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1.) Who worries about what they will look like when they are older?
Mundyne: "I'd say Alphys, because she's more self-consious in general."
Alphy-chan: "Between Alphys and Undyne? Uhm... I think Alphys would worry about how SHE looks, and Undyne wouldn't care about it. ><"
Fyru: "Alphys, because she's more concerned about what others think about her."
2.) Who hogs the blanket?
Mundyne: "I think it depends on where they're sleeping, because of the climate. Alphys would hog the blanket in the lab, and Undyne would in Waterfall."
Alphy-chan: "I have the headcanon of Undyne taking up the whole bed, so that is why I think she would be the one who hogs the blanket. Like... 'I AM THE OWNER OF THIS BED WHILE I AM SLEEPING NGAAAAH!' Something like that."
Mundyne: "LOL And it doesn't help that she's taller. ><"
Fyru: "Undyne, because she secretly wants Alphy to snuggle with her."
Mundyne: "That's an adorable reason. OMG! ^^"
3.) Who eats the others' uneaten pizza crusts?
Alphy-chan: "Undyne leaves something uneaten? LOL! I think both of them eat the whole pizza slices ><, but I would say Undyne here."
Mundyne: "I agree!"
Fyru: "Alphys because...... idk why. She just likes it. :/"
Mundyne: "Is it because Alphys is more of a voracious eater than Undyne? I think it's the opposite. ;)"
Fyru: "Idk. I think it's just because she likes pizza crusts. :/"
4.) Who is more likely to cry over a sad book or movie?
Fyru: "Alphys, because she's more sensitive to the feels."
Alphy-chan: "I am not really sure about this one. Alphys is more used to sad things, so I think she is not really a monster who can cry easily. I would say Undyne again!"
Mundyne: "I think the both of them, because they'll both get REALLY into the anime they're watching. ^^"
Alphy-chan: "Maybe you are right!"
5.) Who talks smack while playing video games?
Fyru: "Undyne, because she's an angry fish."
Alphy-chan: "Both of them, LOL! Undyne because... she is Undyne, and Alphys because I can imagine her like the little kids who says 'I f****d your mom' on Counter Strike. LMAO!!"
Mundyne: "LOOOOL! I think it's like movies for them. They'd get REALLY ionate about the game, and might even piss each other off. But then they'd go back to being lovey-dovey once the game's over. :P"
Alphy-chan: "Like this?"

Mundyne: "LOOL Cuuuuute!"
6.) Who sings along with the radio?
Mundyne: "I think Alphys, but she'd do it alone. ><"
Fyru: "Yeah. Undyne would do it loudly just to embarrass Alphys."
Mundyne: "OMG That's funny. My headcanon is that Undyne sings terribly. She should just stick to playing the piano. ;)"
Fyru: "XD Yeah."
Alphy-chan: "I think both of them... terribly, but they enjoy it. LOL!"
7.) Who would enter them both into a talent show?
Mundyne: "I think Undy would. Alphys would berate herself, and Undy would try to cheer her up by entering her into a talent show. She'd , too, but just as moral . ^^"
Alphy-chan: "I think Undyne. Alphys is too shy to perform in front of a lot of people >< ...and Undyne can play the piano!"
Fyru: "Undyne, because she's more confident."
8.) Who would accidentally set the kitchen on fire while cooking?
Mundyne: "We all know that answer. :P"
Alphy-chan: "That is a pretty obvious question. ^^"
Fyru: "Yeah, it's Undyne."
9.) Who would throw the other into a pool?
Fyru: "Undyne would throw Alphys."
Alphy-chan: "What is the point of throwing a fish into a swimming pool? XD"
Mundyne: "Yeah, I agree! ;P"
10.) Who shops for groceries?
Fyru: "Both, because they go together."
Mundyne: "I'd say Undyne, because she likes cooking. ><"
Alphy-chan: "I would say Undyne GOES to the store and Alphys orders it online LOL. Undyne purchases healthy food and Alphys buys snacks and noodles."
Mundyne: "Ooh, I like that. ;)"
11.) Who kills the spiders?
Mundyne: "I think neither of them, because Muffet would get mad. ;P"
Fyru: "Yeah. I think so, too."
Alphy-chan: "Same ^^... but I can imagine Alphys dreaming about eating a cup full of spiders :P. But, since Muffet is her neighbour, she can't. LOL!!"
Mundyne: "But, isn't her baked goods made out of real spiders? ><"
Alphy-chan: "... wait a minute... I thought it was made BY spiders and not OF spiders o.O That means... Muffet eats HER OWN spiders!?!? That is canibalism!!!"
Mundyne: "LOL I'm pretty sure that's what it said! *goes to check*"
Alphy-chan: "Oh my goodness."
Mundyne: "It's true..."
Alphy-chan: "*facepalms*"
12.) Who is the morning/night person?
Fyru: "I think they're both night people. XD"
Alphy-chan: "I guess Undyne is more of that type of person who prefers to wake up early and do a lot of things during the day and Alphys is more like that type who keeps awake until very late at night watching anime, which makes her stay up super late."
Mundyne: "I agree, too! ><"
Fyru: "Hey. That's a good reason. :+1: "
13.) WHO PROPOSES?
Mundyne: "I think I know you guys' answer on this one. ;)"
Alphy-chan: "Yup ^^ but, actually, I can imagine them both like...
Alphys: 'I-I have to ask you something.'
Undyne: 'Hey! Me too! Lets say it at the same time!'
Both: *kneels* 'Will you marry me?' *the world explodes*"
Mundyne: "AWWW!!!! That's adorable!"
Alphy-chan: "I know, right!? *//*"
Fyru: "I want them to both propose to each other at the same time. That would be cute!"
Alphy-chan: "Yeah ^^"
Fyru: "Like, they both propose and get super excited about it. :3"
Mundyne: "D'aww.... ^^"
Fyru: "That would be so cute!"
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Tag your posts with #AboutYourOTP so I can read it, even if it's not Alphyne. ;)

Comments (33)
|(~^-^)~| |~(^-^~)|
(("The world explodes"
Me: ALLAHU ACKBAR!!!))
Reply to: Sans/Scout/Lucas
((...wut? :P ))
http://aminoapps.descargarjuegos.org/p/u525k
Tadaa~!
Reply to: Enonza
((*violently goes to read it*))
Reply to: Just Undyne
Oh god XD
Hell yeah!!!
ALPHYNE IS SO FINE!!!!!!!!!!!!
*runs in circle and screams*
Tbh I really enjoyed Undyne's song
Ah hahaha
._.