High School DxD Death (DxD & DBZ+DBS crossover)

Part 1- Secret piece

(Before traveling to the underworld for summer)

(Issei enters the club room and sees Rias lost in thought)
Issei: president what's wrong? You seemed a little down the past few days I've been worried.
Rias: just remembered someone who should be here.
Issei: who's that?
Rias: Raw. I went to the underworld to see if he had returned but he's been away for so long.
(Akeno enters)
Issei: who's Raw?
Akeno: Rias! Please please tell me there's news about him?!
Rias: the opposite.(she begins to cry)
Issei: can I help find him or something?
Rias: thanks for worrying sweet Issei but I'll allow Akeno to tell you his story.
(The rest of the club enter)
Asia: big sis Rias! What's wrong?
Rias: Akeno will explain. (She walks out of the room)
Koneko: what's up?
Akeno: oh my, where to begin?
Issei: the beginning?
Akeno: it's a long story but here goes.
A boy was born from an agreement from the previous Lucifer and head of the Phoenix, Lady Phoenix and Lucifer mated and produced a charming kind young boy but as you would think his power was incredible.
This caused the Satan to seal him in a dome of immense power which only Satans could open when he reached the age of 4
Xenovia:they sealed away a 4 year old?
Kiba: just how strong was he?
Akeno: he rivalled Riser at 4 that's why he was sealed. He had the ability to travel into different realities which he used to train in many lands. At the age of 12 he asked if he could have a friend but all the devils were scared of him. All but 2. Rias and Sirzechs. They would meet everyday at the same time and they talked and talked.
Two years later she resurrected me and a year later she took me to see him and there stood in this dome, a boy, as normal as could be. He was kind, as you know I hate men well all but Issei. he was the first I ever liked, he was kind and funny but all he knew how to do was fight. Rias and I felt sad at how he had to live until lord Gremory spoke to us and told us that he could break out at any time he wanted but he didn't want to until the Satans agreed. He didn't want his power to cause destruction.
Kiba: he's that selfless?
Asia: I want to meet him.
Xenovia: I want to mate with him.
Koneko: I agree. To the first.
Issei: kiba? Is it just me or do you feel a knock to your pride too?
Kiba: they don't even know what he looks like or anything about his personality but they fell for him already?
Akeno: oh my, they aren't the only ones, he has just the greatest deep brown eyes and the cutest little smile, the thought of him being back brings me near tears. He is kind and gentle while being the most powerful devil there is or maybe Issei overtook him but still. Anyway enough of that sidetrack.
At the age of 16 he decided his body was in peak condition and slowed his ageing as devils do.
He then asked another request.
Asia: what did he ask?
Akeno: he asked to join a family as a piece.
Kiba: his power yet he'd rather follow than lead?
Xenovia: that doesn't make sense.
Akeno: when every family wanted him he was expected to follow Riser but he flat out refused and said the only he'd join was Rias.
Kiba: but we're a full set.
Akeno: the Satans commanded a break in rules for the power of his size. A secret piece. He, is our brother, Raw the Gremory secret piece.
Issei: well where is he?
Akeno: He told Rias he found the perfect world to train in and he hasn't been heard from for 20 years.
Issei: after all that time couldn't he be dead?
Akeno: he isn't dead I just know it.

(After the events of dxd born)
(At breakfast)

Rias: I have an issue with my brother that needs resolving before I'll be able to go to school today.
Issei: president. Is everything okay?
Rias: it's just a matter of relations with Micheal.
Akeno: usual plans and accommodation?
Rias: unfortunately...
Asia: well I hope you have a nice trip Rias.
Kiba: come back safe president.
Rias: I shouldn't be too long.
Akeno: you ready?
Rias: let's go.
(They use a magic circle to teleport to the underworld)
Sirzechs: Rias! Glad you could make it.
Rias: of course brother. How are you Micheal?
Micheal: I am well, will the red dragon emperor be joining us today?
Rias: not today.
Serafall: hi! (She smiled as she skipped towards the others)
Vali: so many weaklings in so little a space... how pitiful.
Azazel: Vali! What is the meaning of this?!
Vali: after witnessing the power that Rias can wield I decided she was too dangerous to roam free.
(Vali throws a dagger in her direction)
???: Rias No!!!
(A boy jumps in front of the blade)
Rias: No!!!
You will pay!!!
???: no Rias... what is this? I feel like my power is slipping?
Vali: the blade slowly drains the power of whom it strikes.
???: dammit! No!
(The boy fires a blast of energy and Vali disappears)
Akeno: we must get Asia!
(Akeno teleports all the Gremory team to a bedroom and places the boy there)
Rias: Asia help him!
(Rias and Akeno both begin to cry)
Sirzechs: come on you will survive this!!!
Rias: that dagger was meant for me!
Akeno: you know he couldn't just let that happen.
Issei: who is he?
Rias: remember when Akeno told you about Raw? This is him.
Rossweisse: I'm sorry Rias, Akeno, I have no idea how this must feel for you right now.
Koneko: but we're all here for you.
Sirzechs: he isn't gonna die from a dagger. It will take a lot more than that to finish him.
(1hour later Rias and Akeno are holding his hands while Sirzechs and the others watch on as Asia tries to get him conscious)
Raw: I feel so weak.
Sirzechs: that attack would have killed anyone else. That includes myself.
Rias: don't ever scare us like that again okay?
Akeno: please don't.
Raw: I'll try not to.
Rias: we have a rating game soon where you could test your new power.
Raw: I'm afraid that my showing there won't be very impressive... the strength I lost hasn't returned and I will need to build it back up.
Akeno: you have 2 weeks to get some strength.
Raw: I will only be as strong as a rook or knight by then but I will try for I am a Gremory and honoured to serve Lady Rias. I would bow but...
Rias: I know you would but you need to just rest for now.
Raw: Akeno, when I get my strength back I know a place I can take you to improve your abilities as a lightning priestess.
When my strength is back i'll be able to probably teach all of you a thing or two.
Xenovia: I would be honoured.
Kiba: that's if you can use a sword.
Raw: I can but I'm better with my hands.
Xenovia: better without a weapon?
Raw: carrying anything affects speed and against knights fighting speed with more speed is better than trying to overpower them.
Also I think it looks cooler.
Rias: Issei, Vali won't be a problem anymore. Raw beat him.
Issei: really? Wow you're strong!
Raw: no I only had the power to teleport him to a time rift. I'd say 6 months before he returns.
Akeno: how long until you regain your full power?
Raw: I don't know maybe 2 years. If I see you guys train I'll know where you scale to my full power.
Rias: Issei doesn't have consistent power, he is powerful when he needs to be.
Raw: that is very dangerous and undependable.
Issei: it's worked so far!
Raw: every time?
Issei: no...
Raw: in that case I'll train you to fight properly and increase your power level.
Akeno: what do you mean power level?
Raw: the last world I trained in had a measurement for fighting power.
Sorry I feel so weak right now... it's shameful.
Xenovia: taking the hit you took? It shows your strength.
Raw: I'm ashamed of my reactions, the way the blade was thrown. The only deflection I could do could have hit Akeno, if I was thinking straight I could have gone around and hit it the other way or even caught it. I just... I saw Rias in danger... and I... I am her sworn protector.
Rias: sworn protector? What do you mean?
Sirzechs: he swore a lot of oaths regarding you and Akeno, you know that.
Raw: Rias is my master and mistress, I am sworn to protect her with my life, I do all she commands, I make her wishes true, my life belongs to her, I am her shield.
Akeno is my master and mistress, I am sworn to protect her with my life, I do all she commands, I make her wishes true, I am her shield.
Akeno: oh my you would do anything?
Rias: don't even think about it!
Akeno: I am his master.
Rias: I was his master first!
Rossweisse: I wish I was his master.
Koneko: me too.
Xenovia: ditto.
Rossweisse: I said that out loud?!
Raw: haha...argh jeez that dagger did damage.
Asia: but I completely healed the wound... I didn't mess it up did I?
Raw: no you did well. I'm just tired.
Sirzechs: we'll let you rest.
(All leave but Rias)
Raw: hey.
Rias: I've missed you so much.
Raw: I missed you too.
Rias: you know that issei is special to me?
Raw: I saw, others feel like that too.
Rias: Akeno feels for you more and I still love you.
Raw: I love the both of you, always will.
Rias: will you watch out for issei?
Raw: sure. why?
Rias: he isn't strong but he can become the strongest if he is angered.
Raw: I'll watch his back.
Rias: thank you.
Raw: I'll watch everyone's backs, to the best of my ability. While I still have my instincts I don't have my speed or strength.
Rias: we can fight fine without you, in the next game just try to get a feel for fighting at a lower power.
Raw: that will be hard. But I'll try.
Rias: I know you will... thank you.
(Rias leaves the room)
Rias: do you all want to talk to him privately?
Kiba, Akeno, xenovia, rossweisse, koneko, asia and issei: yup.
Rias: oh dear...

This is my first try at writing anything and I hope I haven't messed up too bad. I'm open to criticism so please criticise away.also how the fuck is Sirzechs' name spelled?! I seen it as Sirzechs Sirzex Serzex and Sir Zex.