After some thinking, Issei decided to learn about his life and death aura for now with LD because that's what bugging him the most for now since he doesn't want any mishap in case its gone berserk and kills someone he doesn't want to kill accidentally.

LD also agrees with this because she doesn't want Ise to kill anyone near him just like a certain Dark Mage she once saw.

(AN: Its Zeref in case you're wondering)

Even though Ise understanding and mastery are low enough to not kill anything at the moment but it's still better to be safe rather than sorry.

So she spent some times teaching Ise about it, and she's surprised because it only took him a week to learn the basic which is surprising because its quite difficult to learn that even Hades spent his whole life trying to understand the basic, that just tells that her new beloved perception is just that good.

(AN: I mean in the canon dxd Issei learn new stuff on a short amount of times considering he never trained his whole life no?). From what Ddraig told her that he is indeed a genius, even the word genius doesn't do justice on his talents. He can make new skills just in a short amount of time even though it's quite a perverted skill mostly, but making new skills never been that easy for anyone even Gods find it hard to make a new skill from scratch.

Just a week after he learned the basics of the aura he can control it like an expert even though not as good as her, but it's still quite good for a beginner. He could gain mana just by absorbing life force around him albeit its still a bit slow. And she finds out that he has more life force than most living being she has seen so far considering his young age that's quite amazing.

And now that he's totally focused unlike his old self who always being perverted most of the time, it just boosts his perception even more, and she can tell that sooner or later he will get to where she is now.

And during the times where she teaches him, their relationship also gets a bit closer, not that close but still close enough. He used to avoid her every time and only talks with her when it's during the training session, he spent most of his times training his new found 'Aura' so he's mostly inside his room

(AN: LD obviously have a house you don't think she floats around like a ghost don't you?).

But eventually, they talk about small stuff like whats their favorite foods and some general stuff like that, and the way he looks at her now isn't cold and detached like he used to before. It contains warmth and a bit of trust even though he doesn't show it much from his expression but she can tell from his eyes and she's happy that he finally started opening up to her.

Sadly she isn't really proficient in the use of weapons, so she's thinking how to solve that problem. And when she's searching for the answers she remembered about the Queen Of The Land Of Shadow, she knows if she's searching for the best master on the usage of arts of weapons then 'She' is the one.

So she went to The Land Of Shadows and look for her and she found her right away, well... She's the one who found her instead you could say.

??? - What are you doing here, LD? Don't you know that I like to be left alone?

A woman with a stoic face asked her

LD - Long time no see Queen Of The Land Of The Shadow, I believe you have been well since the last time we met each other?

??? - Spare me the pleasantries and tell me your purpose for coming here and begone. Or I shall end you.

LD - Oh, why do you have to be so cold~. We both know you can't kill me... Even though I also can't kill you either for that matter.

??? - Hmph! I could try once more if you wish so and even though I can't kill you, I can still hurt you.

LD - And at what cost? The loss of your trusted spear Gae Bolg or your life itself? Besides, I have no ill will by coming here so set your animosity aside, and as for the reason, I came here. I believe I have found the perfect candidate to be your student isn't that what you want this entire time? To train a worthy student that can best you?

??? - Hoo~, really now? And what if I deem this your so-called perfect 'Candidate' doesn't fit my requirements?

LD - Oh, I believe he will perfectly fit your criteria I can vouch for that. And IF by chance he doesn't fit your requirements then I shall do fulfill anything you wished of me. So what do you say?

??? - Interesting... For you to go so far for this person that means he's the one you have been searching for all this time?

LD - Indeed, he's the one I have been searching for... My true love...

??? - HAHAHA! Very well you got my interest, but I shall judge by myself if he's worthy or not.

LD - You can do as you see fit.

??? - Heh, let's go then.

So they went back to LD domain.

Back at Issei, when he gets out from his room he's wondering where LD is because usually she always greets him right away which he finds kinda cute, to be honest. So he looked around the house to see if she's here or not. Just when he's wondering where could she be, there's a sound coming from the entrance of the house so he walks there to see if that's her.

But when he arrived at the entrance he didn't expect to see another woman whose beauty is on par with LD. Looks incomparably perfect from any angle. The good-fitting package under the purple leotard, he can see the fair skin that can put the moon in shame indistinctly, the elegant purple long hair smooth and gentle as if made from the silkiest silk... an out of the world gracefulness, the crimson pupils like they can understand all sufficiently, even soul. The plentiful and sexy stature, but also has a noble cold proud makings, as if like the Queen. The making of a perfect pinnacle of woman.

LD is a bit jealous when she saw him become a bit absent-minded but she doesn't mind that much because even she has to admit the Queen beside her is on par with her own beauty.

While on the other hand, the newcomer is a bit dazed herself seeing the boy in front of her, he's indeed the most handsome boy he has ever seen but what makes her surprised the most is the way he looks at her.

There's not a tiny bit of lust in his eyes only appreciation and that's a surprise because there's never a man can resist her beauty like the boy in front of her. That enchanting wine-red eyes also surprise her a bit because she thought he's a vampire at first but apparently not, she can feel the 'Aura' of a Dragon from the boy in front of her and she can feel just from his 'Aura' alone this boy in front of her have a great amount of will, the will to become the strongest which is to her liking. And he also sees the aura of the king of kings faintly, the boy might not realize it yet but he's already walking on a road to be the king of kings himself.

She doesn't think that she can feel love because she never found one worthy of her love hence why she wants to shape a man to her own liking on the pretense of having a student that can fit her requirement so that said student can be worthy of her love and no one ever knows her true reasons for looking for a perfect student, at least that's what she thought, but unknown to her LD knows her secret because she can see the same looks from her eyes... The desire to be loved.

A warrior-queen from Celtic - Ulster mythology.The queen and gatekeeper of the foreign territory - haunted realm called "Land of Shadows", a prodigy of usage of all kinds of weapons but known best of her spearmanship.

Possesses a power immense enough to rule and close the gate of the "Land of Shadows", which is overflowing with countless ghosts. She also acquires the Eternal Arms Mastery trait from her mastery in combat, which allows her to understand and use any and all weapons with the proficiency of a master. Proud and not serving anyone. A natural-born ruler from birth.

Possessing the traits of a monarch, she holds reign as the Queen. Overflowing with talent, she herself understands more than anyone else that she is different from the mediocre. In the same way, how she has an understanding of herself, she is also endowed with a reliable Mystic eye to see through the character and traits of others (in particular, whether they are mediocre or not).

Having turned halfway into a Divine Spirit at the end of a long time, she can no longer die as a human. Neither a beautiful death. Nor even a hideous death. She must simply continue to exist, until the time when the world - and its outside - finally disappear.

She has been looking for a perfect candidate her entire life but she never found one and that's why she finally enclosed herself and never venture out of her domain any longer and eventually she's forgotten by most people, LD is one of the few existences that still know her.

Usually, for any trespasser that came to her domain, she will kill them straight away without question asked because of her boredom and disappointment of never found the candidate she's been looking for.

But finally, she realizes the boy in front of her might be the person of her desire! She thought he might be the one who can perfectly fit all her requirements! Therefore even if LD didn't ask her to teach this boy in front of her she would've done so regardless and even take him by force if needed just so she can shape this boy to fulfill her long time desires. Then she snapped out of her thoughts and told the boy-... nay the youth in front of her.

??? - Youth, comes with me.

Her voice is cold but valiant at the same time, with the arrogance of a Queen that makes people who heard her will submit themselves. That's basically what happened to most people she met so far, they submit to her commands. But she expects this youth will be different.

Issei - What? And why should I follow you?

Issei asked back in the same cold tone. The youth in front of her doesn't betray her expectations, because if by chance he submits just like that then he's not worthy of her love. LD also felt the same.

And when she about to talk once more LD interfere and told Issei, "Ise, She's the one who will teach you on weapon and close combat proficiency. And her name is-

Before LD can finish her words the newcomer cut her and told him her name herself.

??? - The name is Scathach Skadi, and what is your name youth?

Issei is surprised because he remembers he has read about her before and recognizes the name of the woman in front of him along with her legends but because he's already been with LD for a while he's not too surprised anymore meeting strong beings such as herself and just reply calmly.

Issei - Issei Hyoudou. And it's nice to meet you. Queen of The Land of The Shadows.

Scathach - Hoo, you know who I am?

Issei - I have read some books about you.

Scathach - Is that so? Very well, now that you know my purpose we can skip to the point and I shall shape you into the best warrior there is. Now, follow me. And call me shishou from now on and don't you dare slack off during the training or I will show you the consequences.

Scathach turned around and gesture Issei to follow her once more, but this time Issei goes along with her but not before saying "Thank you" to LD and that makes LD really happy that he recognize her effort for him, so she responds back with "You're welcome, dear~" with a seductive voice and that makes Issei blush a little bit but with a small smile that not went unnoticed from her because that's the first time he smiles after all this time even if it's only a small one, but just that small smile is enough to make her heart beat faster, her face blushed even til her long ear twitched up and down a little bit because of the sheer happiness she felt.

Scathach who saw this from the corner of her eyes felt a bit tinge of jealousy because that smile isn't for her and she's thinking how to make him smile like that for herself, but she will bid her time to make that happen because she's already waited long enough just to find the man she's been searching for, so she can wait a little bit longer just for it.