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radexchangeprogram · 3 years

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This is a random one but can I request head cannons of the Brothers and Dateables reacting to an MC that’s actually a half demon but was really great at hiding her demon side since she grew up in the human world? They see a demon man just bounding towards MC before the boys could do anything MC’s like “DAD! 😃” before jumping in his arms like a child. Around her Dad she gains fangs and horns like him but she reverts back to normal when she wants to. The boys are like “Why didn’t you say anything?” And she’s like “I’m just used to my human side” or “You never asked 🤷🏾‍♀️”

Of course! I love this idea. I didn’t get a chance to proof read this so I apologize for any grammatical mistakes.

Author’s notes at the end (marked by *s)

Spoiler warning for up to chapter 17 to be safe. Especially with Belphie.

Half Demon GN!MC Headcanons

General

Everyone noticed that you never seemed too bothered by the fact that you were surrounded by demons, but figured you were just rather good at adapting.

This theory was proven wrong at a party Lord Diavolo hosted.

As you chatted with the brothers, a large demon with griffon wings, a lion’s mane, and horns similar to a gazelle began to head in the direction of your group.

The demon, who the others instantly recognized as Duke Vapula, walked up to them with a cheeky grin.

The brothers were instantly on guard, Mammon even growling slightly, as it was extremely uncommon for anyone to approach them so casually.

Diavolo, Barbatos, Simeon, Luke, and Solomon all took notice and were prepared to intervine should something happen.

You turned around to see what the issue was and let out a loud gasp.

“DAD!”

Lucifer

Absolutely dumbfounded. How did he not know about this? He read your files to the point of practically memorizing them before you came here and he swears there was nothing about you being a half demon.

He was honestly a bit embarrassed that he didn’t know about something this major.

When confronting you, all you did was say that it wasn’t that big of a deal and that you figured they already knew.

You really give him a migraine sometimes.

He feels a bit relieved that he doesn’t have to worry as much about you dying, though.

If you wish, he may start teaching you demonic etiquette, such as having you shift form at formal events.

If you prefer your human heritage, he won’t pressure you to conform to your demonic ancestory.

Mammon

WHAT THE HELL DO YOU MEAN HIS HUMAN ISN’T ENTIRELY HUMAN?!?

The loudest about his displeasure about not knowing.

“I’m your first man! I’m supposed to know everything about you!”

When you explain to him that you’re more comfortable with your human half, he calms down a little.

Tries to call you ‘stupid half-demon’ but it doesn’t feel the same as ‘stupid human’ :(

You tell him he can just keep calling you ‘stupid human’ :D

Wonders if he can get your dad to pay him for ‘providing his child with such incredible protection’.

You immediately tell him no.

Leviathan

Holy shit this sounds like something straight out of an anime!!!

Very upset that you didn’t tell him, you’re his Henry! You’re supposed to tell him these kind of things!

When you shrug and simply say that no one asked, he gets even more pouty.

You make up with him quickly by offering to play games with him all night.

Extremely curious about your demonic form for the primary purpose of cosplay. Do you know how many more characters you can be if you have a tail or wings?!?

You might inspire some fanfiction. (half demon Henry x Lord of Shadows au slow burn 100k words, def not Leviathan projecting no not at all-)

Satan

He is extremely shocked. Not only did he have no idea, but half demons are extremely rare.

From what he’s read, most half-human half-demon offspring don’t survive past birth and all documented cases that have survived reside in the Devildom so that their powers can be better managed.

He asks you about this and you reply that you’re actually quite good at controlling your powers, but that you prefer living as a normal human.

He’s not upset that you didn’t tell him, but he has a billion questions.

How long is your lifespan? Do you take more after your demonic father or your human mother in terms of power?What are your weaknesses?

He really wants to learn more about human-demon hybrids and will ask you to help in his studies.

Also a bit excited as your father is well known for some for his knowledge and writing about the sciences. He wants to discuss some of it with you, assuming you’ve read what your father has written.*

Asmodeus

Oh he is so excited.

A bit relieved that his charm isn’t wearing off, it just doesn’t work because you’re the child of a demonic duke!

You know those boiling hot springs he talks about visiting? Well he’s happy to learn that you actually can join him without fear of your skin melting off!

He’s not upset that you didn’t tell him, getting mad over stuff like that can cause wrinkles.

He will absolutely want to help you groom your horns/wings/scales/tail.

He already has shown you a lot about demonic fashion trends, such as extra clothing that can be fitted around demonic extremities, but now he actually can actually have you try on some! Do you prefer gold tail bangles or jeweled horn cuffs?

Beelzebub

Relieved that Duke Vapula wasn’t looking for a fight.

He can’t help but smile a little when you hug your dad. It makes him happy that you love your family.

When you blush and tell him that it just slipped your mind to tell everyone about your heritage, he isn’t upset.

Happy that he doesn’t have to be so scared of accidentally hurting you with how strong he is.

If you’re able to safely eat some more demonic food, he will absolutely get you to try some of his favorite foods that normal humans would die upon eating.

Overall, you’re still the MC he has grown to love and doesn’t treat you too differently.

Belphegor

Is now more awake than he has been the entire evening.

Half demon? Nah this is just some dream.

Is understanding when you explain to him that you prefer being human and living as a human.

He’s happy he found out after making amends with you. He used to despise half-demons just as much as normal humans, seeing them as repulsive.

He still very much treats you the same, but is a bit annoyed with his brothers.

With knowledge of your demonic blood coming to light, they drag you out even more often and naps with you are becoming rarer.

If you get too overwhelmed with his brothers constantly wanting to try things they thought would previously kill you, he will be more than happy to lend you some of his hiding spots. He does charge the small fee of getting to take a nap with you though.

Diavolo

Similar to Lucifer, is shocked that he didn’t know before you came to the Devildom.

You aren’t the first half-demon he’s met, but he is surprised that a demon of Duke Vapula’s rank had a child with a human.

He’s actually very excited to learn that you’re a half-demon who is in more in touch with your human side. He feels a lot more relieved that you aren’t as defenseless as previously thought.

He does, however, make absolute sure that you have full control over your demonic powers. Every other half-demon lives in the Devildom for a reason and he can’t have someone who is technically one of his subjects accidentally cause mass destruction.

He invites you for tea more frequently, asking so many questions about how being raised in the human world as a half-demon was.

He likes to exchange stories with you about your younger years and the power fluxes you both struggled with as you grew.

Tells you that should you ever wish to live in the Devildom that he would be more than happy to make the needed arrangements.

Barbatos

He knew the whole time. When Diavolo asked him to look into the success of the program, he made note of your heritage right away.

However, he decided that keeping this information hidden when he saw that you were raised human and preferred to be seen as human.

When he explains this to everyone, you can’t help but feel thankful.

While some of the others make no effort to hide how annoyed this makes them, he doesn’t mind. He knows he made the right choice keeping this from everyone and doesn’t regret it at all.

Barbatos is actually a pretty good friend of your father’s and grew up with him. He actually met you when you were a baby because of this.*

Solomon

He has seen a lot in his years in the world of magic, but nothing like this.

Usually, half-demons were very easy to spot as they struggled to control their powers, but you practically had it down to an art!

You explain to him that you’re actually pretty good at keeping your powers under control. He’s rather impressed by this and will ask to see your spell work.

Thinks it’s a little funny that he has a pact with your dad.*

Like Satan, he wants to know all about you. Unlike Satan, he is going to actually conduct experiments instead of stick to interviews.

He has a new potion that he wants you to try almost every day now.

Can half-demons make pacts? If so, you have now been added to the list of demonic beings he wants to make a pact with.

Simeon

Very surprised considering he’s blessed you before.

Blessings aren’t supposed to work on anything of demonic nature so he’s baffled.

When you explain to him that you were raised human and prefer to live as human, he smiles.

He comes to the conclusion that you being a good person must be greater than the demonic blood in your veins.

He treats you the same overall, knowing that you’re still you no matter your heritage.

Luke

Absolute denial.

There is no way someone as nice as you is part demon! He refuses to believe it!

Gets upset and accuses you of trying to manipulate him, which you quickly deny.

When you explain to him that you prefer being human, he huffs.

Simeon gives him a bit of a talking to, about how you’re still the same MC who he sees as a big sibling.

He bakes you some apology cupcakes for being rude to you.

You sometimes shift form to mess around with him, it never fails to make him let out a shocked yelp before he snaps at you for picking on him.

Everyone (except Luke) thinks it’s funny tbh.

Author’s Notes:

*Duke Vapula is described as being able to bestow knowledge about all science contained in books.

*Barbatos is also a duke in The Goetia. I thought a fun nod to this would be to have them as friends.

*The Goetia talks about the 72 demons that King Solomon evoked. Vapula is one of the demons that he evoked. The game actually references this by talking about his 72 pacts. Asmodeus and Barbatos are both included in the 72 demons which is why he has pacts with both of them in the game :)

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