Kaliie Natsutu is my Assassination Classroom OC, and this is her story.

----------------

Kaliie had an abusive father growing up. It was her, her father, her mother, and her sister. When she was younger, she was a little bit happier, because she didn't understand how bad her father was at the time. She met Karma Akabane in Elementary school, and they became best friends. When the two were in 3rd grade, they had a little pretend wedding. They used Ring Pops as their wedding rings. Kaliie had her sister as a bridesmaid. 

When they got older, however, Kaliie started to see how dangerous her father was. Her little sister, Maytiun, was terrified, but Kaliie always told her that one day, them and their mother would escape from their abusive father. He would abuse and rape all three of them. Their mother, wanted to divorce him and take her beautiful girls with her, but knew that it wouldn't do much. When in Middle school, when Kaliie was in her second year and Maytiun's first year of it, Maytiun met Asano, and the two dated for a while. Kaliie, didn't really like him, but knew that he made her sister happy, so she was alright with it.

Kaliie was a bit more violent, like Karma. She would beat up people who messed with her friends, and try to drown people who spoke ill about her sister, mother, or Karma. She would threaten Karma when he would annoy her, but he wasn't afraid, and the two would eventually make up. Kaliie also met Nagisa there, and became his friend.

At the end of the year, Asano had told Maytiun that they had to break up. She was heart broken. "P-please...if I did something wrong, I ca-" "You didn't, I just...I'm sorry," Asano said, feeling very bad. Maytiun ran off crying, Asano wanted to go after her, but knew it would make things worse. Kaliie saw the entire thing.

Aside from Karma, Maytiun was Kaliie's world, and hated to see her upset. Kaliie was going to make Asano pay, but she was called down to the principal's office. She went, but glared at Asano. You'll pay for hurting her... she thought.

"Ms. Natsutu, your behavior is unacceptable, you are in A class, but because of how violent you are, you will be moved to E class," the principal said. "What?! You're moving me because you can't control the pricks of this school?!" she yelled. "I'm a lot better than your son is! I hurt people because they deserve it, your son hurts people because he doesn't give damn about anyone but himself!" she yelled. "He doesn't put them in the hospital, good day to you," he said, turning his chair the other way, Kaliie stormed out.

After school, she walked home with Karma and Maytiun. "I'm being moved to E class..." Kaliie said. "At least you're not being suspended," Karma said, showing the paper work. "Are you serious?!" she yelled, taking the paper and reading it. "Ugh! This day is the worst! First Maytiun gets hurt, then I get moved, and now you're being suspended!" she yelled, Maytiun gently hugs her sister. "E-everything will be okay sis...you've told me that everything will be better, now it's my turn..." she said, smiling at her older sister. Kaliie smiled gently, and hugged her sister back. "Thanks, I hear you're going to hang out with your friends tonight, be careful, okay?" she asked, and Maytiun nods.

Later that night, Kaliie, her mother and father were watching the news. "Get me another beer women!" Kaliie's father yelled at her mother, who went and did so, Kaliie glared at him, and he noticed. "What are you looking at brat?" he asked sternly. "A monster, that's what," she said, getting he pocket knife out and flipping it. "I'm being moved to E class, I blame you for being violent to me, mom, and Maytiun," she said, he stood up. "It's not my fault you're a bitch," he said, going to get to her, but she got up quickly and pinned him to the floor with her foot, her pocket knife to his throat. "Yes. It is. But the thing is, when I have kids, I won't be a monster like you," she said, getting off him.

"This just in, there has been a car crash, three girls were killed, they are Tarie Killie, Ruby Gluyan, and Maytiun Natsutu, two of their friends and the other driver has survived, but the other driver was seen fleeing to the forest," the news reporter said. Kaliie froze. "M...Maytiun is...d-dead?" she said, tears going down her face. Her mother came in with tears. "Who cares? At least it's one less person taking up air," he said, drinking his beer. Kaliie threw her knife into his arm, and ran all the way to Karma's, staying there for the night. "K-karma, Maytiun is...is..." she started, but Karma pulled her into a hug. "I know...I saw it on the news," he said gently.

A week later, the school had a funeral for Maytiun. She was one of the nicest and smartest girls there, even some people who picked on her went. Kaliie and Karma obviously went, her mother went, but her father didn't. Asano and his dad even showed up, Asano was...crying. 

Before the funeral ended, people went over to Kaliie and her mother and gave them flowers, some people apologized for teasing her and said they were sorry for their loss. Asano went up. "Kaliie...I know you hate me, but I did love her, I had to leave her...my dad-" "Don't. I don't care about your excuse...but I do see you did care..." Kaliie said gently, and gently hugged him. "You were her world...she loved you," she added. "I know...I hated having to tell her I had to leave her...I...I wanted to marry her," Asano admitted, crying a bit.

After a few weeks, Kaliie's father's friend came over, Karma went over and hanged out with Kaliie. Her father's friend was trying to do stuff to her mom, but she tried to get him to stop. "I'm going to check on Kaliie..." she said, going to get up, but the friend grabbed her. "Not so fast slut," he said, pulling her close, Kaliie's father just laughed as her mother struggled. Kaliie and Karma went to go see what was happening.

When they got there, they saw Kaliie's father's friend get out a knife. "You want me to kill you?!" he yelled, Kaliie's mother tried to scream for help, but it was no use. The friend slit her throat, and she bled to death. "Good job getting rid of that whore!" Kaliie's father said. Kaliie was crying. "Mama!" she yelled, going over to her mother's corpse. "Dave, grab her," Kaliie's ordered his friend. Dave was scared, but did what he said. Kaliie's father got a knife. "Say goodnight," he said, but Karma went over, and got a knife, stabbing her father over and over. "You're never hurting them again!" he yelled, taking Kaliie and running, throwing the knife to Dave, who caught it, and got his fingerprints all over.

The police arrived, and arresting Dave, for the murder of Mr. and Mrs. Natsutu. Kaliie felt all alone now, but Karma took her in, letting her stay with him and his folks. Kaliie lost a lot, but she's also gained a lot. She still had feelings for Karma, but never told him.

And now, Kaliie was going to try to save the Earth...by killing Koro Sensei

---------------

Yeah...her backstory is sad.