#rending scissors

Both updated blades combined with the screw to make the Rending Scissors.

Satsuki: Your Snippity-Snips are just another fancy pair of scissors. Your blade shall never reach me!!

Ryuko: Well we'll see about th- WAIT. My what now?

Satsuki: Y-your scissors!! Your scissors shall never reach me!!

Ryuko: No, you said something else. You said "snippity-snips".

Satsuki: How ridiculous. I said no such thing.

Ryuko: You looked me right in my eyes and yelled it at the top of your lungs.

Satsuki: Even if I did say something as foolish as that, you can't prove it. You have no witnesses.

Ryuko: Hey Senketsu, you heard her right?

Senketsu: Yes, loud and clear.

Ryuko: HA! Guess you ain't so proper huh Kiryuin?!?!

The man, the myth, the legend.

Soichiro Kiryuin/Isshin Matoi was a very complicated man. While he loved his daughters, he wasn’t the best father. He was against life fibers, but used them to his advantage. He had his reasons, but his choices have a huge effect on Satsuki and Ryuko both negatively and positively.

Soichiro was a brilliant scientist, and Ragyo somehow got him to marry her. Maybe she charmed him with the idea of him being able to push the boundaries of science and having the freedom to do so. He never anticipated using his own children as test subjects, but let it happen anyways. Satsuki wasn’t affected, but Ryuko was “killed”. Losing his child and having his wife throw her away made him snap. From that day on, he would be an opposed to Ragyo and Life Fibers.

Soichiro most likely found out a bit later that Ryuko survived. He couldn’t tell Ragyo that the experiment had been a success. He knew she would groom Ryuko to be just like her, so he hid her and began to raise her in secret. A few years later, he finishes Junketsu for Satsuki. He made Junketsu a 100% Life Fiber Kamui, so he knew it had a desire to destroy. He also knew that Ragyo was going to have him killed soon, so he turned to his eldest daughter. He gives her Bakuzan and introduces her to Junketsu. He tells her the truth about Ragyo’s intentions and why she needed to be stopped, and lies by telling her that her baby sister was killed in the experiment. He knows that the thought of her “dead” baby sister would change Satsuki forever. She would never be corrupted by her mother or Life Fibers, even without him in the picture. When the time comes, he fakes his death and leaves Satsuki to be raised by Ragyo, but under the watchful eye of Soroi. He has to watch Satsuki grow up from the outside. With the kiryuin’s wealth, Satsuki was most likely in the public eye a lot. He probably worried about her from time to time, but knew she’d be alright.

Soichiro changes his identity to Isshin Matoi, an elderly scientist. His true goal was to stop Life Fibers and Ragyo by using Ryuko. He knew that Ryuko herself wouldn’t be enough to stop her, so he begins to plan. He starts off by making money off of his inventions. He, then, spreads the word about Life Fibers and the Kiryuin clan. As a result, he gains a following and Nudest Beach is founded. As Ryuko gets older, he no doubt feels regret for what he did to her and what she’s going to have to go through in the future. He sends her away to boarding school and focuses on his work. When she asks about her mother, he tells her that she’s dead. Ryuko becomes a troublemaker. She’s alone and confused, but Isshin remains distant from her, and Satsuki. He knows that he must figure out how to make a Kamui that would obey a human’s commands. Otherwise, Ryuko would be doomed to be consumed by the Life Fiber’s influences. Kinue Kinagase is a casualty of his research, but he presses on until he figures it out. He creates the Rending Scissors and Senketsu, a Kamui with human DNA (Ryuko’s DNA to be exact). Senketsu would be different from Junketsu. He would have human emotions and protect Ryuko, not consume her.

He knows that Ragyo would soon figure out what he was up to, so he sends Ryuko a letter saying he wanted to talk, but Nui kills him before he gets the chance. All he could do was give her the scissor blade and the motivation to seek the truth. He knew that Ryuko’s stubborn nature would cause her to search the ends of the Earth to find his killer, and that Aikuro would insure Senketu and Ryuko would be brought together.

Satsuki never forgot that last conversation with her father. She thought that if she didn’t bring Ragyo down, nobody would. Not only that, but she had to avenge her father and sister. For thirteen years, she planned how she would take her out. Pleasing Ragyo but also plotting her assassination. She no doubt grew up fantasizing about what things would be like if her sister and father were still alive, and that gave her even more motivation to have her revenge. As the time came closer, her began to perfect her plans. However, Ryuko shows up and turns everything upside down. Little did they know, they were after the same thing.

After it is revealed that Ryuko are Satsuki sisters, both are understandably shocked. Both of their lives had been a lie and had no idea how to react. Satsuki is left to meditate about everything by hanging in a cage. She surely thought a lot about her father and how he lied to her. She probably felt betrayed, but she also might have felt guilty for toying with Ryuko by dangling the truth in front of her. It wasn’t just Ryuko’s father, it was her father, too. However, this doesn't stop Satsuki from wanting to take Ragyo down. It only strengthens her resolve.

Ryuko loses it and goes on a rampage. It backfires and she is forced to wear Junketsu. Just as Soichiro feared, it controls her. She becomes Junketsu’s puppet because he fills her head with false, but pleasant memories. Isshin was never a showed his affection for Ryuko, so the fantasy of her and Ragyo is more than enough to fill her with happiness. With the help of those who care about her, she breaks free. Satsuki and Ryuko make up and their bond grows stronger.

As Ryuko battles Ragyo in space, she tells her mother, “It ain’t like I was raised by you”!! Ragyo responds, “Ah yes that was a mistake”. Who knows how things would've been if Ryuko was raised by Ragyo. She’d probably be like Nui, a heartless weapon. Ryuko was a weapon, but one who would fight for everything she held dear. Isshin knew what she was capable of, and knew if she were to be discovered by Ragyo at an impressionable age, the Earth would be doomed. So as cold as it was, sending her away was the best way to protect her. If she hated him, then so be it. All that mattered was that she was safe. She grew stronger from it and was able to defeat her mother.

The Scissor Blades are asymmetric. That looks pretty cool.