A/n: hello my fellow readers now before this story begins I'm going to be adding Rajine to the harem now if you guys think I shouldn't add her to the harem please let me know to the reason why I should change my mind of her in the harem in the comments let the prologue begin.

3rd pov

in the past 3000 years before the Demon King ordered his youngest son Zeldris to eliminate the vampire clan. Zeldris fell in love with a vampire named Gelda who also fell for him the two kept their relationship secret mainly from the Demon King who thinks emotions such as love is meaningless. one day the two took their further in doing so they ended up having a baby boy who has his father's black hair as it was also in a similar style to his while the boy's eyes of that of his mother's. as time passed they managed to keep their son who they named Y/n away from the war that was happening between the races but now Zeldris is ordered by his father to eliminate the Vampire clan which also include his lover and son.

Gelda: Zeldris....what are we going to do about Y/n?

Zeldris: for him to be save I'm going to put him in a temporary seal for 3000 years. hopefully that will be safe enough for him but I'm not fond of having him be alone.

????: then why don't you send us with him in the seal?

the two turn to see a woman with blond hair that covers one of her eyes wearing a dark red outfit carrying a woman on her shoulders with one arm.

A/n: like this just remove the Hellsing emblem

Gelda: Seras Victoria? what are you doing here and whose that your carrying?

Seras: *gently puts the person down* I was just heading to you to check on you and your son *looks at Zeldris* I see your here too sir Zeldris. also the person I brought was one of the few demons that were bring held hostage by archangels while one didn't seemed to be a part of I was only able to save this one. I also saw some of the commandments there.

the person woke up as they get up the three look to see who it is as Zeldris immediately recognized the person.

Zeldris: Derieri's sister? why bring her?

Seras: well mainly I don't like seeing the defenseless being killed for no reason.

Rajine: huh? where am I? last thing I remember was being trapped in a giant sphere.

Seras: easy there your still weak from what was about to happen to you.

Zeldris: you should listen to her Rajine.

Rajine: sir Zeldris? where are we? what's going on here?

Zeldris: okay but you have to keep this a secret.

Rajine: I'll take it to the grave.

Zeldris: good, you see me and Gelda have a child together. but I don't want him to be involve with this war or let my father know so I'm putting him in a temporary seal. but I don't like the idea of my son being alone.

Rajine: I see....well if it's not too much trouble I want to be in the same seal as your son so that way he isn't alone.

Seras: same with me like lady Gelda I will protect your son with my last breath.

Zeldris: are you two sure the seal will keep you in for only 3000 years but for you it will only feel as only 3 or 4 years have passed.

Seras/Rajine: yes.

Zeldris: very well.

he then gets the seal ready placing it on the two girls then lastly on his son. but before he does him along with his lover take one last moment to spend with their son.

Zeldris: hey son I know you won't understand what I'm saying at this age. but what I'm about to do is for your own safety as well as your mother's.

Gelda: and we maybe far way but we will always be watching you and in your heart my darling child.

as they said their piece their son opened his eyes and smiled at his parents and said the two words that made them smile and Zeldris revealing his green eyes.

baby Y/n: dada....mama.

with that they kept that to memory once they heard their son's first words. Zeldris then gives Seras his son then puts the seal on them as the two girls and baby Y/n disappeared from being sealed. while the events of the of three thousand go by.

-timeskip after three thousand years-

Meliodas pov

A/n: this is taking place before the Sins were framed for murdering Zaratras

me and the Sins were heading to a location where there was a sighting of a bright light some where near the forest of Vanya. as we get close I keep sensing a power similar to my brother Zeldris but it also felt different to him which I can't put my finger on it.

Ban: hey captain what do you think we will find when we get there.

Meliodas: not sure if it's anything bad then there's nothing we can't handle.

Diane: that's like our captain!

Merlin: anyway we're almost to our destination once we enter keep your guard up if anything attacks.

we then enter the forest with our sacred treasures out in case any thing attacked us. as we moved forward I get the feeling we were being watched by something or someone. I then turn to one direction where I saw something move very quick with a hint of black and red.

????: who goes there!

we then heard a voice which sounded like a woman then a bright black and red light hits the ground as it sent a shock wave to us. then we see a woman wearing a dark red outfit with black and red magic like energy flowing around her left arm. she also has blond hair but her eyes they were bright red as she was glaring at us.

A/n: ignore Integra behind Seras

woman: who are you! and what is your purpose here?

Merlin: we're the Seven Deadly Sins we were sent here to investigate a bright light that happened in this forest.

woman: Seven Deadly Sins huh? I don't buy it how can I be sure that your actually here to harm us or my young master.

Ban: us? you mean there's more people with you? exactly who is this young master of yours?

Merlin: more importantly what is your name and race?

woman: I'll tell you mine if you tell me yours and know your purpose here.

Merlin: that's fair enough my name is Merlin I'm a human. the Boar sin of Gluttony.

Ban: names Ban the fox sin of Greed and I'm immortal.

King: my name is King my race is my secret until I can trust you.

A/n: I know King is a fairy but during this time he's in his human form

woman: fair enough for you.

Diane: hi! I'm Diane and I'm a giant.

Gowther: my name is Gowther.

Meliodas: and I'm Meliodas please to meet ya.

I notice the woman looked at me in shock knowing who I am but keeps a straight face about it. she then closed her eyes as the black and red magic energy starts to shrink to size that of an normal arm.

woman: well since I know your names. my name is Seras Victoria.

Merlin: and what's your race?

Seras: Vampire, now what is your purpose here.

Merlin: like I said we are here to investigate a light that appeared here in this forest. do you know anything about that?

woman: that is my young master and a friend of ours along with myself temporary seal releasing us.

Merlin: temporary seal? what was the purpose?

woman: to keep my young master safe from the holy war that happened 3000 years ago.

Merlin: I see well we can assure you we aren't a threat to your master. if it's possible we like to talk to them.

woman: fine, but don't try anything funny. okay you two you can come out!

then we see two people come out of the trees behind her one was a woman with short messy orange hair wearing a large buttoned shirt with black eyes. next to her was a small boy shyly hiding behind her leg. the boy look like his age is around nine years old but what catches my attention is that the boy shared a resemblance with my younger brother Zeldris but with light purple eyes.

A/n: the demon mark that Rajine has are currently inactive unless she needs them too

Ban: is the little kid your master?

Seras: yes he is.

boy: he...hello my name is Y...Y/n.

orange hair woman: don't worry he's just shy around new people. since it just us three.

Meliodas: well why don't you live in a village or town?

Seras: well there's one problem you see me and Y/n are Vampires while I can control my hunger for blood and other vampiric abilities. my young master still need time to control them.

Merlin: well how about you three come with us to Liones I'm sure the King can help you three settle in and I know a place that can help your master with controlling his blood thirst and abilities.

Seras: that is up to my young master

Meliodas: *smiles* well what do you say little Y/n?

Y/n: I don't mind.

Rajine: well we have our answer.

To be continued

A/n: and done that take's care of the prologue I hope you guys enjoy it now I still need to know the power level total and break down in the comments. also please let me know about how you guys feel about Derieri's sister in the harem please let me know and I'll catch you guys later