(Y/N Kamado lost his sister Nezuko, and blamed all of Atlas for her death, especially Winter Schnee, who used to be his girlfriend.)
Y/N: I trusted you, Winter... you betrayed me and let my sister die!
Winter: Y/N... you need to understand...
Y/N: I JUST WANTED TO FIND A CURE FOR MY SISTER, AND WHAT DID I GET? HER BLOOD BEING USED TO ENHANCE YOUR PRECIOUS SOLDIERS, ACCOMPANIED WITH A STAB IN THE BACK! I HAD ENOUGH OF THIS! WE'RE THROUGH!
(Y/N then leaves as Winter falls on her knees crying.)
(Some months later, Y/N met a woman named Clorinde, and eventually started a new relationship as she comforted him about Nezuko's death and she confessed her feelings to him. Y/N wasn't sure at first, but seeing that she was more loving than Winter, he decided to warm up to her.)
Clorinde: Don't worry about anything else, Y/N-kun. I shall protect you.
Y/N: I know...
(Suddenly some Atlas Soldiers surround them.)
Atlas Soldier: You're surrounded. Put your hands up!
Y/N: Not a chance!
Clorinde: You're gonna wish you never stood in our way!
(Y/N charges at some of the soldiers.)
Y/N: Ichi no Kata: Minamo Giri!
(Y/N beheads the soldiers with a singular horizontal slash. Meanwhile, Clorinde is more brutal as she attacks the soldiers without giving them a chance to defend themselves. After they destroy the soldiers, they are about to leave, but Winter shows up holding Zenitsu's head as she points her rapier at Clorinde.)
Winter: You! Give me back my Y/N!
Clorinde: He isn't yours anymore!
Winter: He will be mine again!
Clorinde: In your dreams!
(They start fighting as they get completely mad at each other until they accidentally knock Y/N out.)
Clorinde/Winter: Y/N!
(They go towards him.)
Winter: He's knocked out...
Clorinde: (glares) This is all YOUR fault!
Winter: (glares) You're in fault too! (sighs) Look... I want my Y/N back... please...
Clorinde: Alright, I'll share you for two conditions.
Winter: What is it?
Clorinde: One, we have to protect him from any girl who tries to take him away from us, especially a certain oni bitch who works for that Michael Jackson rip-off.
Winter: Okay, second?
Clorinde: You will not be loyal to Atlas anymore!
Winter: I arranged that. I no longer belong to Atlas.
Clorinde: Good, now let's have some fun, shall we?
Winter: Yes.
(Meanwhile at Atlas Military, Ruby Rose and her group are seen investigating the murders of Ironwood and the Ace Operatives.)
Ruby: Who could have done such atrocities?
Weiss: It could only be that Muzan guy... if my sister was the only survivor, he might perhaps be planning some "use" for her.
Jaune: We're not gonna save her by standing around here.
Oscar: Agreed. Let's keep searching.
(They keep searching, not knowing that Winter was the one who actually killed Ironwood and the Ace Operatives.)