Flashback
Thousands of years ago before the fall and before the devil came down to LA and before the death of the metatron(Imagine sephiroth through the story looking like final fantasy sephiroth)
Sephiroth was a bright dreamer. Thousands of years ago, he had an idea. He created a plan to hold all the angels separate from the mortal souls.A city of silver and light,and technological advancements. With the power and glory of his parents.
He called it the silver city. It is a beautiful city where it would be at the center of heaven and the central point of all of creation.
Sephiroth:Brother, a shining city,within heaven. I have plans for it,look!
Sephiroth tried to show the construction plan for what he called the silver city.
Metatron:I've told you this before. Angels cannot besides our elder brother,mother,and father.
Metatron flew away as sephiroth was left alone deeply sadden. Raphael(deku) flew down and landed next to him.
Raphael(Izuku) had his usual green hair and blonde. His hair was longer reaching until his shoulders,golden wings, and naked. (Reminder he looked like his adult self at the end of mha without the scars)
Raphael(deku):(Put a hand on his little brother shoulder)Are you alright sephiroth? I saw you talking to metatron, and when he left, you became sadden?
Sephiroth:He said that I couldn't make my dream... The silver city.
Raphael(deku):Let me see. (He grabbed the construction plan and took at it) Wow! This... This is incredible. How could he refuse this?
Sephiroth:He told me that only you,father,and mother could create.
Raphael(deku): That's pastorous!? We all have dreams and angels. Our brethen can uphold the power of creation.
Sephiroth:But he is our heavenly Father and mother speaker.
Before Raphael could rebuttal. Both sensed a powerful angelic presence.
Samuel flew down in front of us with a neutral expression. His pure white wings were eye-catching, and a face no women or men can refuse.
Sephiroth: Samuel? What brings you here?
Samuel:Just bored. Needed something to occupy my attention.
Samuel was a force to be reckoned with equal and only weaker than amenadiel and Raphael.
Raphael(izuku):OH,nothing expert for this. (He handed him the plans for the silver city)
Samuel:(Looked across the construction map,smiling impressed,nodding before giving it back) Impressive showmanship, brother. Well, I couldn't have thought up the idea myself.
Sephiroth:Thank you,brother. But,metatron states we angels can not create like our father or mother.
Samuel:Sounds like a idiot to me(rolling his eyes)
Raphael(izuku):Samuel! (He crossed his arms at calling metatron a idiot)
Raphael thought of a plan. To truly make the dreams of the rest of the heavenly host happy.
Raphael(Izuku):Well,fine than. Since I am the only angel allowed to create. I shall bring upon myself.
Raphael gathered all the other angels and announced that he needed their help. With the other angels by his side, he and his brothers and sisters began constructing the heavenly city for the host.
The building of the silver city was done. It is truly a godly moment of the host. Even metatron decided to accept the creation of the city, and the godly parents were amazed and happy by their children determination and allowed it.
Sephiroth was in a room of one of the buildings in the silver city. Making more construction plans for his passion project was doing great.
Metatron behide him with his hands behind his back. Looking as sephiroth explained all of his plans and reading through all his construction work towards the spokesman of God.
Sephiroth:See, this is gonna be the fountain of creation. It's an eternal flame that burns just as bright as the outer heavens.
Metatron:An musing conceit.
Sephiroth:No,it is a symbol. The fire is spirit,forever upwelling,forever reborn.
Metatron:sephiroth.
Sephiroth:And in some sense, it is ourselves,too-- For as flame is,we are essence without shape. Energy without the bounds set by
Metatron:Sephiroth!(He took the construction plans from his desk). I need you to give ownership of the city to me from now on.
Sephiroth:Why!?
Metatron:Because the heavenly Father and heavenly mother thought I would be the better candidate than you.
Sephiroth:No! You don't deserve mine or anyone's else hard work!
Metatron:So,that may be brother...
Metatron quickly and efficiently knocks sephiroth out cold. Metatron took him to the center of the city. Sephiroth woke up.
Sephiroth:Where am I?
Metatron:You shall be trialed for your crimes in front of the heavenly host! You shall be put to death.
Samuel saw what was happening before him. Angels stood still, even amenadiel did not try to stop this injustice as there was no appearance of his father and mother coming down.
Raphael wanted to help, but...
Michael:Brother,don't fight back it could lead to the separation of the heavenly host... Our family. Would you let our family tear apart because of your selflessness... or selfishness?
Raphael(deku):No...
Michael:So,we should stay put where we are.
Michael went towards Samuel, who was in a tough position at the moment.
Michael:You should help your brothers. There is our family,right?
Samuel:Yes.
First, his jealous and hurtful pride over humanity being his father and mother favorite creations to now with the injustice of heaven.
He couldn't take it anymore. He had to do something,anything.
Samuel mind:(Right,sephiroth wanted me to use my morningstar power to light the fountain forever... I should fulfill my promise).
As sephiroth was gonna be sentenced. Fire shot out the fountain out of it, and lucifer wings in flames moved out of the fire.
Samuel:You do not speak for me. I speak for myself.
Metatron:Lucifer,do you also wish to be put in your place?
Raphael(deku):(He flew between all of them) Enough. I thought if I didn't intervene, the host would fall. But enough is enough. Sephiroth go,my brother.
Every angel was shocked, not including Samuel,Michael,and the metatron was furious. Samuel saw his home now differently. Especially his father.
Samuel:No... I follow my own rules from now own.(He flaps his wings and is lifted into the air). Anyone who wants to join me in true freedom. Come and join my crusade.
Raphael(izuku) and amenadiel are sadden as lucifer and his followers left the silver city. That is how the heavenly war began.