Your POV:

I was now sitting on my couch, in front of those peoples, as that "Arceus" guy sat in front of me.

"You said your name is Arceus, but it still doesn't tell me exactly who you are."

Arceus: So he didn't tell you about us ? He's really getting more and more rude over the years.

Giratina: Shut up you old fool...

"You two know each other ?"

Giratina: I guess it's time to introduce myself properly. I am Giratina, dragon god of chaos and destruction, and those people... are my family.

"Wait, family ?"

Arceus: He's right, I'm Arceus, the god of order and creation.

The two figures who were standing behind him introduced themselves:

???2: I'm Dialga, the dragon god of time.

???3: And I'm Palkia, the dragon god of space.

The three last figures, who were actually sitting on another couch together, introduced themselves all at once, making things rather confusing.

*left* ???4: I'm Azelf, deity of willpower.

*middle* ???5: I'm Mesprit, deity of feelings.

*right* ???6: And I'm Uxie, deity of knowledge.

"Well, as you probably already know, I'm Y/n, and to be fair, I never imagined having that many divinities in my house at the same time..."

Arceus: There's no need to be afraid about that, you're practically a part of the family since your soul and Giratina's

are fused.

"You know about him being my sacred gear?"

Dialga: That's why we came here in the first place, to see if you're able to wield his powers correctly, and I must say, I'm disappointed.

Giratina: Cut him some slack already, it's been literally two days and he's already able to use my powers, for a human, it's not a small feat.

Arceus: Both of you calm down, we didn't came here to fight.

"So why are you here, apart for telling me how weak I am ?"

Palkia: That's the whole point, we're here to help you achieving your full potential. We weren't supposed to intervene yet, but your little "encounter" with that fallen angel, and the fact there's devils trying to recruit you forced us to reveal ourselves.

"If it can reassure you, I gently told them to piss off and leave me alone."

Arceus: Yes, we felt how "gentle" you were, but that actually is a very good thing.

"And why is that ?"

Arceus: I'll keep it simple: By accepting Giratina as your sacred gear, your souls fused, making you the next dragon god of chaos and destruction, and his successor.

"... So... does that mean... I'm a god now ?"

Palkia: Not yet at least, you'll only be considered one if you're able to master the full extend of Giratina's powers. For now, you're considered as a "Dragon god emperor".

Giratina: It'll also mean that you've overcome me, and proved yourself to be stronger than I was. Once you reach that stage, our souls will be fully fused, and I'll disappear in your subconscious, becoming a part of you.

"I see..."

Arceus: That's also one of the main reasons for our presence here, we're here to help you train.

"And how are you gonna do that ?"

Palkia: Some of us are gonna enroll in your school, to both keep an eye on you and on those devils.

"I'm not even surprised anymore..."

Arceus: I also wanted to personally thank you, both for saving him from dissipating, and helping keeping his powers in check.

"By hearing that, it sound like you guys have some backstory together..."

Giratina: More than just "some backstory" he's the one who sealed me away in the distortion realm.

Arceus: You tried to destroy this entire dimension !

"WAIT WHAT ?!!"

Giratina: It was billions of years ago, I already told you I got over it a long time ago !

Arceus: That's why I'm glad your host isn't a destroyer himself.

"So you're saying that I'm acting as a seal of some sort ?"

Palkia: Exactly, you may not realize it yet, but you're currently preventing him from using his full strength. However if you were to lose control of your powers, he could get back in control.

He continued to explain me some details about Giratina's powers, such has what to NOT do with them, and something about the "neutrality" of gods, all while Giratina and Arceus were still arguing together, under the amused gaze of the spirit trio, who somehow got pop-corn.

About that whole "neutrality" thing; apparently, gods and dragon gods can't take part for any of the three factions, which explain why they reacted so fast when they spotted the tomato trying to recruit me.

"Let me get that right: If I start a conflict with one of the three faction, as long as it's personal matter, you're not allowed to help me ?"

Dialga: Precisely, and that's one of the few things that were worrying us, since you may be not strong enough to stand against the high-ranked ones on your own.

Palkia: You may have defeated a fallen angel on your own already, but he was merely a basic soldier. Trust me, their leaders are way stronger than them.

"I see, so what's the plan ?"

Palkia: Like I said, we're going to enroll in your school, and train you in magic, hand-to-hand combat, and swordsmanship.

"That along with Giratina's mental training, It's going to hurt..."

My thoughts were interrupted when I felt a tug on my back, and I noticed Palkia and Dialga trying to hold their laugh. I worriedly turned around, and saw my tendrils trying to strangle Arceus on their own will.

"Were they... Always like that ?"

Palkia: More or less... They never get along. Even when he was living with us, they would always fight over little things, mostly about who is the strongest.

"I don't intend to sound rude, but you should leave before he kills someone..."

Arceus: Do not worry, we were about to.

I retracted the tendrils in my back, much to Giratina's protest, and I accompanied them back.

Arceus: Some of us will see you tomorrow, until then, I recommend you to stay alert of potential threats.

"Don't worry about that, according to them, I'M the potential threat here."

We parted way and they all teleported away, while I prepared myself for bed, and another training.

Meanwhile, the ORC clubroom, 3rd person POV:

A certain red-haired devil was currently freaking out.

Rias: What...The hell...Was THAT ?!!

The clubroom door suddenly swung open, and two other girls entered the room.