I DO NOT OWN HIGH SCHOOL DxD. IT BELONGS TO ITS RIGHTFUL OWNERS. I DO OWN YUI BAEL. HER CHARACTER IS WHAT HELPS OUT THE PLOT A LOT. I'M THINKING OF TAKING OCs FOR PEERAGE MEMBERS.
30 years before main storyline.
We see a young woman walking down the aisle of a makeshift area for a wedding. The two people getting hitched happen to be Yui Bael, the strongest clan member, and former Dragon King Tannin, the second most powerful devil that isn't a Satan. Tannin was one of four known dragons who could take human form. He knew what love was, but never had a true experience with it. Yui was always the benchmark for her family. But she was also one of the kindest Devils to serve all throughout the underworld. It was said that not even her brother could take her down. Lord Bael loved his youngest sister, to the point he'd move just about anything to protect her. It was out of that love for her that he respected her love for the former dragon King. The fact that he was the, in Lord Bael's opinion, the Dragon King of Destruction. Most people knew that Lord Bael hated people inside the clan who didn't inherit the Bael genes. He was willing to make an exception for Tannin and any children those two had, for good reason. Either way there were odds of having the backing of pure destruction. Whether it was the Bael abilities or the abilities of the Blaze Meteor Dragon, he just didn't care. He was willing to allow the dragon to take his clan's last name out of respect and friendship. They decided to get married by their friend Sirzechs, and when he heard that, he was shocked.
"Do you Tannin take Yui Bael to be your one, true mate?" "Yes, I do." Tannin stated.
"And do you, Yui Bael take Tannin to be your one, true, mate?" Sirzechs asked. "Yes, I do." Yui replied. Then by the power vested in me as a Satan, I gladly announce you two husband and wife." he stated. "Well go on. Kiss her old friend." Sirzechs demanded. "Oh I plan on doing more than that when we go to Hawaii. Sirzechs. My territory is to be protected. I would like for you to go to the familiar forest and get Tiamat. She must look after it. Tell her that Tannin needed a favor." Tannin asked. "You got it old friend." Sirzechs replied. He then conjured up a magic circle in his palm. "Hey Serafall, I know you're a bit busy right now but can you do me a favor, and yes it involves your job. I need you to peacefully talk with Tiamat so she can look over Tannin's territory. Tell her that after he comes back with his mate from Hawaii, she can go back to the forest to live in peace. That is if the first child of those two doesn't go after her as a mate. Thank you Serafall, I owe you one." The Satan then headed back to work not truly knowing what will happen in the future.
9 months later
Yui and Tannin are in a hospital in Sitri territory, expecting their first son. Early tests showed that his power is derived from Yui's power of destruction and Tannin's destructive abilities. There was also something off about their son. A power that the former Dragon King hasn't felt since the Great War. "Yui, my dear. Our son will be as powerful as a Super Devil. He outclasses everyone short of Ajuka and Sirzechs. He even outclasses the Super Devil descendant of Lucifer. He'll be having an extremely bright future ahead of him." Tannin stated, trying to take Yui's thoughts off of the pain she was feeling. "A-a-are you sUURE he's GOING to be tHAT PoweRFUL?" Yui choked out through the pain. "I know he'll have your compassion and not the Bael way of thinking, especially with his happy mother and knowledgeable father to guide him through his early life. By the way, when he's born, would it be possible to cast a spell where he doesn't have to listen to your older brother's one mistress. I'd tear her apart myself if she degrades my own son in front of me and that he' have to hear it." Tannin stated, with extreme emphasis in the ending sentence. "Believe me when I say this. Personally he hates her due to the fact that she's such a bitch who can never shut her fucking mouth. He personally said to me that if he so much as heard her speak ill of his nephew, he would vaporize her into nothingness. Geez. My brother is an ass but he has his moments." Yui stated as the pain subsided.
"Congratulations Lord Tannin and Lady Yui. You're now the proud parents of a baby boy." A nurse stated. Lord Bael was nearby crying because his youngest sister had a true family, something he honestly wished he had. He wasn't, however, going to spoil their first moment with his problems. "Well Yui, what'll we name him?" Tannin asked. Yui replied, "Issei, Issei Bael."
Ok. This is just chapter one. Issei is born to the younger sister of Lord Bael and Venelana. He is the only devil m, who had not a single ounce of humanity, to be born with the Boosted Gear. Don't worry. Vali, while female, will still have Divine Dividing. She's still a battle freak, but Issei's peerage will play some big roles later on. (Coughs) Riser Arc and Excalibur Arc. Asia is born a human/dragon hybrid. Her father was a male Sprite Dragon but Asia's dragon side is sealed. Only a dragon who is/was a dragon King or higher can unlock her dragon side. Either that or if she dies. This is the peerage list so far.
Issei's peerage
King- Issei
Queen- Valiana Lucifer
Bishop 1- Asia
Bishop 2- decided (won't reveal)
Knight 1- open
Knight 2- open
Rook 1- Tiamat
Rook 2- Kuroka
Pawn 1- Katase
Pawn 2- Murayama
Pawn 3- open
Pawn 4- open
Pawn 5- open
Pawn 6- open
Pawn 7- open
Pawn 8- open
Issei's harem: Vali, Rias, Sona, Serafall, Tiamat, Asia, Kuroka, Katase, Murayama (W.I.P.)
I'll leave you with a tease of next chapter
"Sirzechs is my cousin?!"
"I don't believe he's still allowing her to live after saying that in front of him."
"He doesn't look all that powerful."
"I honestly care about you Issei."
I hope you enjoyed that teaser trailer. War Historian Out.