(I m not going to follow the Akame ga kill timeline for a few chapters, i m going to do a AC Syndicate Jack the Ripper/Akame ga kill side story, its going to go into the main story too)

(1 week later, Y/N's POV)
A week has passed and the killer is still lose, for some reason the people have started to name him Jack the Ripper from how he kills his victims and the letters to the guards were signed under the name Jack, This night 2 more bodies were found, me and boss were going to investigate
Y/N: why are you coming with? You almost never go on missions
Najenda: when someone is killing members of Night Raid, my family, i must take action
Y/N: i understand that feeling
When we arrived there was no one there, except the bodies
Najenda: Katey...and Lizzie, both on the same night
Y/N: this is disgusting
Najenda: you got that right.....we should split up, you search around and ask people if they ve seen anything weird this morning
Y/N: what about you?
Najenda: i ll stay here and investigate
Y/N: okay
I walked out of the alley and started to ask around

(Najenda's POV)
I looked around for a bit before i started to walk deeper into the alley, i remembered the letter, "how many more assassins must die before you see the truth?"
Najenda: only one Jack
I ran through the alley, knowing i was being watched

(No one's POV, 3rd person)
Meanwhile a person dressed in dark clothes, a white mask and a black top hat were standing on a building nearby

(This is what he's wearing)
???: you should've believed Najenda, now i will Hunt you down
??? Jumped down the building he was standing on and slowly followed Najenda as words appeared around him saying stuff as "follow Najenda", "traitor" and "tail her"
Najenda: i know you're there, Jack. The master of terror is afraid to show himself, is he?
???: i am your shadow, Najenda.
More words appeared around ??? Saying stuff like "Catch her", "coward" and "betrayer"
??? Lost sight of Najenda as she walked behind a building as guards were there
???: i will gut every last one of them if thats the quickest way to you
??? Then took out his dagger and performed what he calls "a brutal takedown" as the other guards looked on, horrified

(This is his dagger)

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

(from 0:15 to 0:28 is the brutal takedown)

Najenda walked out of a corner and started to run away
Najenda: come on, you monster. Lets be done with this!
??? Started to run after her as "catch her", "betrayer" and "coward" appeared around him again
???: run all you like, Najenda. I will catch you
They ran through the dark streets
???: i need only to follow your scent. The scent of a wounded animal
??? Lost sight of Najenda again as she ran around a corner and there were more guards there
???: there is nowhere you can hide from me
Guard 1: look sharp, lads! Someone just ran past sayin' there's a killer on her tail!
The guards then noticed ??? And took out they're weapons
??? Then let out a terrifying scream as the guards got scared, ??? Then took out a spike and impaled a guard through they're stomach onto the ground with it as the others ran away

??? Dragged the guard as he walked into a cemetery

(i know this picture doesnt really matter but i really like it)
Najenda walked out from behind a gravestone
Najenda: stop! You want me, Jack? Come and kill me!
??? Then dropped the guard and walked up to Najenda with his dagger out
Najenda took out a dagger and they started to stab at each other
Najenda: this is not our way
???: this is my way
??? Overpowered Najenda but before he could kill her she used her metal arm to punch him in the face and run away
??? Stood up right after and started to run after her
???: you cannot escape me
??? Lost sight of Najenda as he followed her scent to track her down, but when he went out to the street, Najenda had taken a horse carriage and drove away
???: scurry back to your hole, little mouse

(Timeskip)
Najenda had stopped by a building were she had stored things that could help to catch the ripper but when she turned around to leave
???: going somewhere, Najenda?
Najenda: Jack, you're sick
??? Had his dagger out as he walked up to her but Najenda took out a dagger too and they started to fight again
??? Managed to get a cut on Najenda, across her stomach after they had kicked around chairs and other stuff
??? Then started to beat Najenda until she dropped her dagger and she was laying on the floor
???: dont you see the irony, boss?
Najenda: Jack...
???: only you know who the "Ripper" is...but you cant tell a single soul...becuse it would destroy you, and Night Raid
Najenda then saw a Gun on the shelf across the room and grabbed a candle stand on the table behind her and hit ??? With it as she tried to get to the gun
???: No, no, no, NO!
He threw a box at Najenda as she fell to the floor again and ??? Jumped on her with his dagger high in the air
Najenda: Jack, we can fix you
???: fix ME? I am the solution!
??? Then struck his dagger at her as the screen cut to black

(Next day, Y/N's POV)
Y/N: where can boss be? She's been gone for a day
I was back at the base, i went there after i had waited for Najenda to return at the alley for a few hours, the others havent seen her either
Y/N: boss....i really hope that the Ripper havent gotten to you yet