DxD. Perfect Saiyan.

*Yawn~* "Man ,I'm so tired. I guess that happens when you get thrown around all day by a god."

I guess I should use my powers. But how?

[The Support System has been activated! The S.S. is here to help you use your powers until you get used to them.]

That's convenient! I'll call you Suzy. It's only because it's the first two letters of support and system but with a z to make it an actual name.

[Registering name to Suzy. Done]

Alright Suzy ,explain how my powers work please.

[Alright. First is your Bloodline Gacha. This works in the way that I'll let you use this power to draw a random bloodline. Then you have to wait a while to use it again. Based on how strong you are ,the time will shorten. The minimum time is 1 month. You can use it once and then you have to wait for an entire year for another one. Second is Eternal Strengthening. This allows you to gain strength in all aspects for as long as you live at a constant rate. Third is World Travel. It let's you travel through worlds. It's self explanatory. The system also let's you view your status.]

Alright ,then please use my Bloodline Gacha.

[Alright. Spinning Gacha for a random Bloodline.

.....

....

....

.....

...

Done! You've gained the Bloodline: Perfect Saiyan!]

Please explain what the Perfect Saiyan Bloodline is Suzy.

[It's basically the Saiyan Bloodline ,but you're able to transform into the Great Ape whenever you want with full control and you don't need emotions to transform into other saiyan forms only strength. Ultra Instinct still has the requirements of controlling your instincts because it's not a transformation limited to Saiyans.]

Oh! I have to find a safe place to integrate this bloodline. Wait. I'm in a house. I just noticed this. I'm an idiot. Suzy ,what's my background in this world?

[You're name is Kuro Maru. You are the only heir to the Maru family business. You are currently in Kuoh Town and live with your nanny. Your parents are too busy handling affairs over sea and can't watch over you. You are currently six. Because you have the privilege of creating your own body and you set your own age to eighteen. We have taken the time to reincarnate you first and the others will be born later. You are currently twelve years before the plot.]

What is the personality of the current Issei and how old is he?

[Issei is currently four. He is uncorrupted. He only becomes a massive pervert at the age of 13 ,when he hits puberty.]

*Whew!* I can keep Issei from being perverted! I hated the fact that he lusts after women so much that he doesn't train.