User blog comment:Jopjopjop/Volume 20 Spoilers/@comment-104.7.80.176-20150721190514

Say that issei's elder siblings were alive and were replaced with stillborn babies so the kidnapping would go unnoticed, what do you think would happen? Me personally, I think they come back as powerful warriors with dragon type sacred gears like they're younger brother, were rises by evil dragons, and are more powerful than both him and vali. The oldest is a 27 year old woman with brown hair and matching eyes with a voluptuous figure due to to how dragons are as alluring as they are deadly, and the other one is 23 year old man with black hair who looks alot like issei only because of the influence of the evil dragons who raised him his eyes have golden irises and the rest of the eyes are bold black. They're both cruel, arrogant, battle hungry, and more brutal than grendel ever was. They love their baby brother dearly and hold no grudge against their parents for not knowing they existed as they figured the pain they felt from their "death" made up for it. However they don't like the idea that rias and her peerage "replacing" them and feel that because of them their beloved baby brother has been weak for so long and now they want to kill him for these reasons. And they to kill vali for both threatening their parents and for being as they put "unworthy" of being their brother's rival. And they have azazel on their kill list as it was his fault that raynare killed their brother (even though they secretly manipulated her to attack him in a effort to active his sacred gear and release his inner dragon so he could join them). However they plan on sparing asia due her dragon taming skills, how she "healed" their parents broken hearts, her purity, and because of their brother's love and devotion to her (they believe she would make a better bride for issei than rias, and they even already consider her their little sister already). Plus they support their brother's idea of a harem as dragons are known for having a great lust for sex as well as blood, battle and death, it would be a good way for him to stay happy and nothing is more important to them than their little brother's happiness.

additional facts:

-names: helena(after helen the woman whose beauty cause one of the greatest wars in history) and vanitas(yes i'm using something from kingdom hearts, but only because the evil dragons probably saw beforehand how vain and prideful he would be).

-they were fed dragon's blood and flesh when they were younger to make them stronger and gain more dragon power essentially become humanoid dragons as a result. they bathed in dragons blood to gain diamond hard skin, ate dragon hearts to be able to speak any language even animal, and ate dragons tongues to be win any argument, or in this case increase their hypnotic powers which dragons do have because just look at puts you in a trance and even their words can instill you with great courage or intense fear, it's called dragon's spell and only trained dragon can do it, and the only ones immune to it are those who are repeatedly exposed to dragon aura i.e. issei's harem seeing how he often transfer power to them and are constantly throwing themselves on him (hobbit, and spiderwick wiki) and consumed tea laced with powdered dragon fangs and claws for increased strength and intelligence respectively (harry potter, spiderwick, and percy jackson and the olympians wiki) (p.s. the dragon fangs giving you increased strength is possible since sowing them into the ground gives you fearsome warriors).

-they respect only dragons (due to their power), humans(due to their ambition, creativity, and the strong resolve they tend to show), sacred gear wielders and magicians (due to their potential to become powerful beings).

-they look down upon angels(weak doves), fallen angels(disobedient crows), devils(greedy bats), vampires(leeches), werewolves(rabid dogs), pagan gods(petty children) and european monsters and youkai(freaks)

-they believe all of rias's peerage, except for asia, are selfish as they had all their problems solved by their brother, hell he even died again for them, but they didn't even think about helping him with his raynare trauma, and they especially hate rias for this reason as she claims to love him but did't even noticed he was suffering from heartache.

-they respect other dragon type sacred gear wielders (except vali for before mentioned reasons) considering them all family even twice critical wielders. This is especially true for saji, even though his dragon is considered the weakest among both the dragon kings and evil dragons they still consider him a brother especially after he gained his balance breaker. Helena even admitted she would mined being in a relationship with him as both her brothers like him and she can't stand how sona is so blind not to notice a good man like saji standing right in front of her.

-vainitas plans on killing sirzechs, gasper, and kiba because he hates how it looks like they are trying take over "his" role issei's brother. same goes for helena with wanting to kill grayfia, in her eyes no one is worthy of being issei's big sister other that his flesh and blood, being her.

Please give me your opinion on this or any other ideas you have on the subject. I especially want to hear from you admins (jop, b214, and other subscribers to this wiki) and other fans of this franchise.