10 months later...
When I wake up in the morning, I feel a weight on me. Ah, Rias is lying on top of me again. Initially, I used to push her off my bed because she was disturbing my comfort, but I've gotten used to it by now. Waking up with a sweet girl every day isn't so bad after all.
I nudge Rias and she raises her head, and we find ourselves face to face.
Theo: Good morning, sis.
Rias: Good morning.
She blushes a bit as she says this, facing me directly makes her nervous. I can only say she looks cute.
A lot has happened in these 10 months. My bonds with my family have deepened, and I get along better with Grayfia. Since that day's conversation, Rias has become a bit obsessed.
I might have been a bit tough on her. She's not as she is in the canon; I have quite an influence on her. Major events definitely won't go according to canon.
Rias is now stronger and uses the power of destruction more effectively. Although her ability isn't as good as mine, it's improving.
I'm also developing physically more. Today is the last day Grayfia will train us. After that, she will return to Sirzech; after all, she's Sirzech's wife and can't stay with us forever.
When Rias and I train, mine always involves heavy clothing. If I drop them, the ground will shatter. Furthermore, I keep increasing gravity on myself as I get used to it. My demonic energy has surpassed my brother's. I don't think a demonic energy quality like mine can be found easily.
As we arrive at the training ground, we see Grayfia as usual.
Grayfia: Welcome, Theo, Rias. Today is the last day of your training, and I'll see how much you've progressed, so please come here.
Rias and Theo: Yes, sensei.
Grayfia: First, Rias, you start.
Rias creates a spear with the power of destruction and quickly sends it toward Grayfia. Grayfia easily blocks all of it. Rias then creates a large sphere with the power of destruction and sends it very quickly towards Grayfia. With a small turn, Grayfia avoids it and quickly approaches Rias, touching her head.
Grayfia: Well done, Rias.
Rias: Thank you, sensei.
I'm sure Grayfia's serious this time because she wants to see how much I developed myself with her support. Having the sins of pride and wrath and learning to control them has been an opportunity for me to empower myself.
Theo: Grayfia, it would be good if we were ready. Otherwise, you might get hurt, and things around here will heat up.
Grayfia: However you like. I won't hold back, so you should be careful too.
Then we both looked into each other's eyes, and Grayfia started counting.
1
2
3
We both started running towards each other and in a second, we closed the distance between us. She froze my foot, which irritated me. Breaking the ice's effect, I continued. At that moment, a spear of ice was coming towards my face. I dodged to the right and distanced myself as much as possible from her.
Now, the time has come. My new power, fueled by the sin of pride, which I can use even without the sun, is ready. Yes, I possess Sunshine, and the curse doesn't affect me.
As soon as I released the sin of pride, the surroundings began to warm up, and Rias had already hidden herself, her eyes glowing with anticipation. I've been practicing various rituals in the mental palace to obtain Sunshine, and even without the sun, I gain a considerable amount of power.
Grayfia looked at me, saying I shone like the sun and exuded a terrifying aura. She used her ice to its maximum.
Grayfia: Theo, what are you doing?
Theo: Grayfia, you better be careful from now on. I will not show mercy to you. I'll finish you in one move, I hope you can endure it, otherwise, you might blame yourself for being so weak.
Grayfia opened her eyes in surprise. She, being the strongest queen underground, wouldn't allow herself to be defeated by a child, no demon would allow it.
Grayfia: Do your best.
Theo: Know your place, Mongrel.
I raised my hand and created a mini-sun. The air around us started to freeze, and at the same time:
Theo: Cruel Sun!
Grayfia: Absolute Zero!
I threw the sun at her, and she tried to resist it, but her move was already blocked by my attack.
The surroundings turned into dust and when the dust cleared, Grayfia was on her knees, holding an ice spear.
I closed Sunshine and approached her, extending my hand.
Grayfia: I'm proud of you. It's amazing how much you've developed at this age.
Theo: It's all thanks to you, Grayfia-sensei.
Then Grayfia raised her hand to stop me and said:
Grayfia: From now on, call me Grayfia, Theo.
Hmmm, she was smiling at me and her eyes were sparkling. I was almost activating Sunshine. I didn't know someone could smile so beautifully.
Then Rias came towards me.
Rias: You were cool.ni-san Show me again this trick sometime.
Theo: Of course, Rias.
Did Rias ignore Grayfia or was it just my imagination? I set that aside. Then Grayfia spoke.
Grayfia: There's nothing more I can teach you from now on, Theo. and you rias If you continue to develop with like this, you'll quickly reach the Ultimate Class.
Rias held an important position as a mid-high-level demon