(Keys)
Y/n=Normal Talking

King=Hollow/Attack/Demon/Angel/Metaverse/Inner World

Gods Must Die=Mind/Telepathy

(Sae's Mind)

Sae:*groans*

????: why?

Sae: huh?

????: you neglected me and abandoned me because father's death....Sae.

Sae: who are you!? What do you want from me!?

????: Don't you remember me? Sis? The one you abused, neglected, abandon and forgotten because I "killed" our father...

She turns around to see a boy with black hair, a black Shihakusho, a large oversized khyber knife instead of a formal katana. It has no tsuba and no proper hilt. What this boy holds is the cloth-wrapped tang. The sword is about as tall as the boy is and has a black blade with a silver edge. The cloth wrapping on the tang seems to react to the boy's will, changing length at a thought or twining about the blade in an impromptu sheath

Sae: Y/n, l-l-little brother!?

Y/n: hello my older sister....nice to see you again you bitch.

Sae: brother I'm sorry what I did...

Y/n: SORRY WILL NEVER WORK BECAUSE THE YEARS WITHOUT A HOME AND FAMILY!! YOU GOT SOME GUTS TO REGRET YOUR ACTIONS!!

Sae: I'm sorry!!

Sae: please...I'm sorry...

Y/n: how sad, you want me to die like you said: "I just want you to rip your guts because you're a nothing a burden".

Sae:*sobs*

Y/n: how sad...well we'll be meeting again with the phantom thieves, The Investigation Team and S.E.E.S. Maybe our sister would be happy to see me after those years, Sae Niijima my dear older sister...Sweet Nightmares Prosecutor bitch.

Then everything went black.

(Timeskip)(Morning)

Makoto: morning sis.

Sae: M-m-morn-ing sis.

Makoto: are you okay?

Sae: y-y-yes it was cold in my r-r-room!!

Makoto: really? It wasn't cold in my room.

Sae: oh? Okay then.

News Reporter: Breaking news, there are reports of a person who is murdering people left and right. He may have a connect to the Niijima family mostly importantly to Sae Niijima. Here's an audio of his voice but his voice is very different from ours

[There should be a GIF or video here. Update the app now to see it.]

(This is how you sound in Hollowfication transformation)

????:*hollow voice* dam look at that....I guess I have to deal with you Sae. Don't worry about Makoto-oneechan she'll understand the truth but you better not fuck up or I'll tell her the truth about me. This isn't the king, I'm his hollow or you call his inner demon, I hate the rain it brings the pain from my king's heart because you caused his pain.

Then the audio ended with a shocked/confused Makoto.

Makoto: sis who is he!?

But her older sister was not there. Which made her more confused why she left.

(Tokyo District Special Investigation Department)

Sae:*mind* calm down Sae. Focus on the cases and ignore him...

????: morning Sae.

Sae:*yelps* oh it's just you Akechi.

Akechi: anything wrong Sae?

Sae: no nothing wrong Akechi. Any of the cases of this person from the news?

Akechi: we've only gotten photos but they are very gruesome and we gotten one of his weapons before it disappeared in thin air. Here's the photo of his weapon.

Sae: wait I thought Mauser C96 is unable to get in Japan?

Akechi: yes but this one is different since it's been upgraded, having a different camo and shooting out laser but still use normal ammunition.

Sae: this has to be impossible for weapons to have this type upgrade.

Akechi: well not for this teenage boy. Here's a note from the boy who calls himself "The Black Swordsman".

He takes the note and it was written in blood but the hand writing is able to be read.

Don't think that the Tokyo District Special Investigation Department can defeat me. Remember the SAO Incident? The 10,000 people who were trapped by a wanna be god who helped me finish the game. Yes I'm the one who finish SAO, I'm able to find a wife and gotten a daughter who had my DNA along with my wife. After the War of The Underworld I fight killed POH and Miller is now dead stuck in Hell, I'm still here watching your movements. Remember that name who finished SAO.

Sae: Kirito Kirigaya Narusaka but he went missing along with his friends along with the people from Underworld after the Rath event!?

She began to see "blood"everywhere even on her hands. She quickly went to the bathroom to wash out the "blood" off her hands. Then the bathroom changed to a new different room.

Sae: what the!?

Y/n this room is the death bed of my first guide. Almost because my wife and myself lived sadly my leader blamed me for their deaths and committed suicide. I gotten a daughter after the SAO Incident, she was created by Kayaba Akihiko. He knew that myself and Sachi would be lovers so he taken out DNA to create Yui. I've taken care of her like good father and good mother should been. There's a saying family is important, no matter what. I thought Niijima family would never harm another blood and never forget but you harmed me and forgotten me big sis.

The room quickly change back to the bathroom but the person was there behind of Sae.
(Replace PoH with you and replace Kirito with Sae)

Y/n: this is payback for abandoned me, Sae my older sister.

He takes out a knife near to her hip as she paralyzed in fear.

Y/n: isn't fun? To see you a woman who fears nothings to be scared of her own brother who finished SAO defeated Laughing Coffin before Shido. Looks like I'll be back to find you and make your life a living hell if the Phantom Thieves The Investigation Team and S.E.E.S can stop me which this is gonna be fun to see our sister be beaten up. You see, there's no need to wonder where your god is! 'Cause he's right here... *Whispered* and he's fresh outta mercy." Oh and Shido? Let's just saw that I had torture him, hearing his screams it was like music to my ears*giggles*. After that*demonic voice*I had to strip his flesh from his body and send him to hell along those other people who revealed their true selfs where the Devil who she is having a hell of a time with me helping her with her "stress"

Then he vanished as Sae cried in the bathroom regretting her past actions.

(Meanwhile

Ryuji: odd that's so unlike your sister.

Ann: yeah odd when the news came up that person has a connection to you.

Makoto: yeah that is odd.

????: hey I'm kinda lost where is Shujin Academy?

Ren: oh you're a new student?

????: yeah can you show me where's the school?

Ryuji: sure what's your name?

????: Kirito Kirigaya Narusaka nice to meet you.