A/N: I don't actually know anything about RWBY.
So these girls named Yang and Blake had a kid. She was christened with the name OwOhime. Her hair was the color of the rainbow, and her skin the color of whatever she thought she'd like to be today, so she became a pale-skinned white like a vampire. Her name OwOhime was spelled and pronounced as so: O-Woe-He-May. And she took great offence on people who pronounced it otherwise.
After the end of world war two, the world was split into two: East and West.
This was the beginning of World War Two.
Or it should be but a world can't have two World War Two, so it's renamed into World War Two-point-Nine-pi.
OwOhime was a girl. An ordinary girl. Born out of two females and one of them a cat-person. Nothing weird at all. And this ordinary girl had ended World War Two-point-Nine-pi after defeating the leaders that made the war happen in the first place. She was five at the time, and what a powerful five year old she was.
After a new hunter school was instated after the fall of Beacon, OwOhime was enrolled there. But instead of being a part of a four-man team, OwOhime preferred to battle solo. After only two months of doing her best solo, she had defeated ninety-percent of the Grimm in the world. She also ended world hunger by inventing a portable metaphysical nine-dimensional time dilating machine that conjured food of any kind from millions of multiverses. Afterward, she established a program to land into the ruined moon, and succeeded after one month building a rocket and flying there by herself.
Everyone loves OwOhime, and there were no enemies that OwOhime couldn't defeat. Not even gigantic meteors could destroy her, and not even the combined power of all the Eldritch Gods could defeat her. In-fact, she defeated all of them with her semblance: Undefeated. Which makes her undefeated regardless of the power level of the opponent. That's why she can defeat even the Gods themselves.
But it didn't come without a cost, as OwOhime was stranded in a space of void filled with nothingness because the Gods cheated on her. So she just used her upgraded semblance after meditating for two trillion years and a half: Yes. The upgraded semblance, Yes, gave her the ability to transcend Godhood and the concept of such High Deities themselves and create a universe that was made to her liking.
So she made a big, big universe tailor-made for her immortal self.
That was the end of OwOhime's story, ending with her having lots and lots of wild sex with girls her age and older. She was 19 years old at the time, and was the de facto ruler of the entire world.
Also her weapon of choice was a katana that can produce life when it cuts at things that could turn into whatever form of weapon she was thinking then and there. So she sat on a throne with the katana at her side and turned it into a surround sound speaker. After ramping the volume up to 11 Million, OwOhime had a party that lasted for all eternity.
Le Big Fin