3 Entering the DxD universe

Yuki 1st chooses to enter the DxD world as she's kind of interested to know how the evil pieces work so she could create her own harem of girls. Yeah, after meeting with me (Author-san) she started to doubt her own sexual preference and thus decided to hunt some pretty girls and make them strong so they could find alongside her. Just thinking about it makes her drool. 'All the Yuri... Hehe' Yep even the strongest being had mental issues.

After a while, Yuki snapped back to her senses. She was about 2 years before the canon so she decided to find a living space and decided that it would be good for her to become a teacher in the Kuoh Academy as it was the place where the main plot revolves on and started to wonder who should she manipulate to achieve the maximum fun. She didn't want to manipulate Issei as he's too simple-minded and would do little to nothing for her enjoyment. So after a while why not join Vali's team it's bound to have interesting stuff happen right? And so the quest of Yuki messing around with the DxD world has begun.

Roughly 1 year later she finally got in contact with the leader of the factions and several God in this world. She fought them and altered several of their memories so she would be one of the most influential people in the universe. She also met with Ophis and quickly become like siblings, the Stoic Ophis would call her Nee-chan while Yuki took care of her as a little sibling. Yuki also makes her way to the top 10 strongest beings in the universe where she ranked 2nd alongside Ophis as she hid her strength and she was listed as Yuki, Ice dragon empress.

She also successfully entered team Vali, She had taken the role as their mentor and caretaker as Ophis is too pure to do such a job. As such team Vali strength just skyrocketed. Each of them had reached mid-tier Ultimate class at the very least and was capable of taking on the top 10 strongest being in the world when fighting as a team. They could give the top 5 a fight but would eventually lose and didn't even stand a chance against the top 2 which is Yuki, Ophis and Great Red.

Yuki also successfully infiltrated Kuoh Academy as an English teacher, In the school, she just teaches like a normal teacher would and she's hailed as the Dream teacher as she's so beautiful that any students looking at her would enter a dream of a happy life with her. The students agreed that they would kill any pervert who dares to touch their teacher and this is proven by a senior that was beaten up by his junior because trying to molest their teacher. Yuki enjoyed her stay in the DxD universe as she had a sibling and friends to talk to.

[A Normal Day]

In Vali's team HQ, You could see a woman sitting on a couch while feeding a small girl who is on her lap. The girl was enjoying the treat while watching the television. This is the sibling time for Yuki and Ophis. They're enjoying their time when suddenly A monkey flew past them and breaking through the wall. This is Bikou who just got beaten for peeking on Le Fay whose taking a bath.

"Bikou, Fuck you and your ancestor if you don't die today I'm gonna hunt you down." Said a blonde man with glasses. "Look it was an accident okay ?" Bikou said while struggling to get up. They were going to tussle again when suddenly an aura spiked which destroyed the house and the temperature dropped significantly. Vali, Kuroka, and Le Fay then rush there, while remembering the nightmare when they accidentally broke their mentor favorite Teddy bear.

When they arrived they were greeted with an expressionless Ophis sitting on the couch while eating a snack, and a destroyed house. They saw that Bikou and Arthur were being tied up on chains and were tortured by their mentor. They felt sorry for them and tried to escape before their mentor notices them, but alas it's all too late.

Bikou saw them and make eye contact but being seen by Yuki. They gave up all chance of escaping when they hear a beautiful voice calling them, "Ara, Vali-Kun, Kuro-chan, and Le Fay where are you guys going ?" "Nowhere Nyaa," Kuroka answered while gritting her teeth. In these 3 minds, there is one thought 'Damn You Bikou we'll get our revenge.' Yuki then opened her arms and flick her finger which causes them to be chained up as well, "Then join your two friends here." They just sighed in defeat and comply with their mentor wishes.

Meanwhile, with Ophis even though she's still expressionless the one thing in her mind right now is a mental note 'Never annoy Yuki-Nee'. She even forgot that the dimensional gap is her home because her sister insisted that where she was in her home and when she tried to escape her sister she got grounded from all snacks, sweets, and technology. Thus, making Ophis afraid of pissing her sister off. Don't be wrong as Ophis truly loves her adoptive sister it's just she's afraid of annoying her and get herself grounded for doing so.