Y/n is the serpent pillars tsugoko. She was very talented and he saw that right away. Whenever someone said something bad about him like 'he's an asshole' or 'Someone like him shouldn't be a pillar' you shut that shit down instantly defending him. Saying how he's a great person just that he just built a wall off from people and that he's very kind once you get to know him. She trained hard every day wanting to be as strong as her master. But sometimes it was too much. Y/n didn't have the best childhood. She's her family to demons at an early age and was in an orphanage her whole childhood until she was 18 and they kicked her out. She started regressing when one day obani pushed her too hard in training. As she was in her room resting from the hard training she started feeling small. At first she didn't know what it meant but after some research she figured out it was something called 'age regression'.

Y/n didn't tell Obani because she thought he'd think it was weird or that she was weak so she regressed by herself and it honestly got lonely. She wanted someone to take care of her.

"Obani look at that" The little pointed at a teddy bear that was in the window. The bear was very fluffy with snow whire fur and black ears. It reminded the little of Iguro.

"Why would you want some stupid toy?? Come on were here to get the ingredients for dinner tonight" Iguro said and pulled the little away from the bear. Y/n didn't talk for the rest of the shopping trip. She didn't feel well so she asked if she could head back to his estate while he finished up shopping.

Obani sighed "Just be careful and try to get back before dark" Y/n nodded and made her way back.

'Maybe I should tell him when he gets back' Y/n thought as she made her way back to his estate.

Obani finished up all the shopping. He had a heavy bag of ingredients for dinner. On his way back kubumaru slip over to the store with the teddy bear on display pointing his tail to it. Obani gave in and purchased the bear knowing he wouldn't let him down over this.

You thought it would be a good idea to have some little time while he was out and you'd always here him if he went through the door right?? So currently you were on the floor having a tea party with a couple of your stuffed animals. Miley a worn out gray cat. And Fluffy a white plush bunny you got recently.

Y/n p.o.v

I was too wrapped up in my tea party to hear Obani open the door to the estate and before I could put my little stuff away he came in my room and saw everything. He even caved in and got the bear I really liked. I wanted him to say something ANYTHING! But he just stared. Obani placed the bear down in my room before walking out of his estate entirely. I broke down then and there thinking he was telling everyone about what a freak I was.

Obani p.o.v

The first thing I saw when I walked in on my tsugoku having a tea party with her stuffed animals was 'wth' I could see she was upset so I left the estate to go see Shinobu. When I got there I explained everything that I saw. Shinobu smiled and put her hands together.

"Your Y/n is a little Obani!"

I looked at her confused.

"What the hell is that?"

"Its when a person goes into a younger state of mind and acts younger than they actually are!"

This is the first time I ever heard about this. But if this made Y/n happy I would accept it. I started heading back to my estate when I saw Y/n exit the estate with luggage in her hand crying. Kubumaru was quick to act and slithered around her neck and nuzzle into her cheek.

"Where are you going?" I questioned.

"I-i thwought you no want me anymore?" She cried.

"Y/n that's not it at all I was just confused but after talking with Shinobu I figured out what was going on and I accept you" I explained

I started wiping her tears away.

"Take your stuff back inside and start getting ready for bed. It's late and you've had a stressful day".

She nodded and took her things back into her room. When I came back I to her room she was cuddling the teddy bear I just got her. She could hardly keep her eyes open but she managed as I walked over near her bed.

"Goodnight little snake"

"Ni ni daddy"

I was gonna question what she said but she already fell asleep. I patted her head and thought 'I like that'.

(Three weeks later)

"Mommy, Daddy!! I mades a pictures for you" Y/n yelled and showed Obani and Mitsuri the picture she drew of them. They were all holding hands on a hill with flowers surrounding them.

"I LOVE YOU MY LITTLE MOCHI" Mitsuri squealed and hugged their little.

'I'm so lucky to have them'