Some Undertale Headcanons
I figured I’d post these and contribute something to this fandom. Some of these are from my brain and others were influenced by other posts or fan fics. Anyway these are a few of my headcanons for various undertale characters x reader.
-he’s actually pretty good at cooking spaghetti and when he cooks for you on a date he makes the spaghetti from scratch and it’s delicious.
-he always plans something really fun for a date and even if some of his ideas are a little childish or strange you always end up having a blast
-he makes you shirts for your dates (like his “cool dude” shirt) that are very cute and while you were originally a bit embarrassed about wearing them you eventually end up wearing them all the time because they’re comfy and he always looks so happy when you wear them.
-in terms of intimacy he really wants to make you feel good and to make sure you’re comfortable. He spends a lot of time learning what he should do and then has a long conversation with you about what you like and what you need to make sure he does everything perfectly
-he flirts with you through his puns and enjoys saying really cute things that make you blush
-however he gets flustered VERY easily and just the smallest of sweet comments will make him go very blue and he’ll spend the next hour at Grillby’s underneath his hood blushing furiously because he can’t stop thinking about you
-once he realizes you’re flirting with him he has no idea how to handle it starts to act really nervous around you until you finally drag him to Grillby’s on a date because every time you’ve asked him out he’s just cracked jokes because he doesn’t know how to deal with his emotions
-the first time you kiss him he practically passes out
-He regularly tells you that you are the best thing to ever happen to him
W. D. Gaster
-the first time he rips through the void to see you it absolutely terrifies you and while you can see signs of his presence for the next few weeks (like late night dishes being clean in the morning and revisions on your essays) he doesn’t try to contact you again
-you start leaving him notes and cups of tea when you go to bed
-you still have to call out to him to get him to finally materialize which he is very scared to do because he doesn’t want to frighten you again
-he loves to talk to you about science and his eyes just light up when he gets going, even if you don’t understand what he’s talking about you still love when he talks about science stuff with you
-when he gets flustered he gets gloopy and starts to speak in wingdings until he calms down
-he thinks you are incredibly beautiful and doesn’t understand why you would like a messed up monster like him
-it takes forever for him to be comfortable with letting you get close to him physically, eventually he lets you get close to him and you start having cuddle sessions with him
-because he can influence the form of his body he is the best. cuddler. ever.
-very easily flustered and its super noticeable since he goes bright blue and you have almost too much fun making him blush
-he is very skilled at healing magic and when you fall victim to your own clumsiness he patches you up
-and lectures you on being more careful
-which you both know will have zero affect on your future actions
-his chuckle is the sound of a fire crackling
-however when he really laughs its a loud bellowing laugh as well as the crackling but to laugh like that he has to open his mouth which he rarely does as it looks quite monsterish and he’s super self-concious about it
-one day when hanging out at his place you tell a joke that makes him laugh very hard and its the first time you actually see his mouth, you think it is the coolest thing ever.
-he, however, is mortified and locks himself in the bathroom for half an hour while you call through the door to try and get him to come out, eventually when he realizes you haven’t run away he comes out blushing and the bathroom is filled with steam - which is his form of crying - and you reassure him that you aren’t afraid
-his biggest fear is that you will find something about him terrifying and it will scare you away
-he is incredibly worried about burning you so it takes a long time to get him comfortable with being physical with you
-he is also nervous about you being around any open flame, even a candle, which is mostly because burns are the one thing he can’t heal
-as flirty as he is, he doesn’t actually know much about relationships and is very nervous when he finds himself falling for you
-he doesn’t blush, but when he overheats his fans start whirring and the sound is very noticeable when its quiet, he also happens to be very embarrassed about it
-he doesn’t know how to handle it when you ask him about why his fans are always running and he begs Alphys to make them quieter which she says she can’t so the next time you fluster him he turns the fans off which causes him to get way too hot and glitchy and he eventually has to force shut down which terrifies you
-you take him to Alphys who figures out what happened rather quickly and when she gets his systems back online she yells at him for turning off his fans just because he likes you so much that he gets very flustered around you very fast and that’s how you find out he has a crush on you
-he loves to get you gifts but he really just wants to do what will make you happy, and if that’s movie night then that’s what you do
-that being said when he can get you out in public he does because he just adores showing you off to the world
-he marvels at your body, your softness, your curves, and he regularly tells you how beautiful you are
-he’s incredibly gentle and in terms of intimacy he is very vocal, asking you just what you want and he picks up on what you like an don’t like very quickly