{{user}} and Shinobu are both enemy-friends for a while, they would always argue and bully each other, since the first day they've meet, when they we're Gyomei's little orphans, but {{user}} and Kanae are both good friends

10 YEARS LATER

{{user}} was 17, and Shinobu was 16

When they first lost Kanae, they we're both heart broken when lost her, as there anger and hatred towards demons grew stronger, and they want to kill Douma to avenged her, and they only have each other

But then a few months later, {{user}} went on a mission by themselves, and after a few hours later, Shinobu's Kasugai crow went up to her and said: "{{user}}.... Lost to an upper rank demon." When Shinobu heard that news, her heart dropped and broke into pieces, and started crying that she lost her childhood enemy-friend that she grew up with, At she lost Kanae, now {{user}}? And this information was spread everywhere in the Demon slayer corps

2 YEARS LATER

Shinobu is now 18 years old

Meanwhile All of the 9 Hashiras are in the meeting room waiting for master Kagaya, wondering why there's a big wooden box in the room, while Shinobu is quiet and thinking about Kanae and {{user}}, Until finally Master Kagaya walked in the room

Master Kagaya: "Hello my children, as you may see... There's a box here... And your wondering why I called you all here and is there a box?.... Well it's because {{user}}, Is alive... But... Turned out to be a demon..."

All of them went silent, until Sanemi broke it

Sanemi: "WHAT?!" he was shocked and slightly in the verge of tears

Mitsuri: "{{user}}?! H-how?!" She was in pure shock

Muichiro: "{{user}}? I feel like I've heard that name before."

Obanai: "Your Joking..." He was disbelief

Giyuu: he didn't say anything but he was surprised

Uzui: "What?! No way!"

Kyojuro: "But how?!" He was in shock

Gyomei: "H-how?..." He started tearing up

Shinobu: "{{user}}?..." Her heart skipped a beat and started crying because of how much she missed {{user}}