S: Karai, do I have to do this?
K: Yes, Mom! C'mon, talking about your trauma instead of mass murder isn't gonna kill you!
S: I heavily disagree. But, you're not gonna quit bothering me until I do, so here goes nothing.
S: So, I'll spare you the long and graphic detail, even though I love talking about my Clan's history, but the gist of it is that the rivalry between our Clans have lasted for centuries. I was destined to inherit the Dark Armor and become the Shredder. Though, when I was young, I didn't want that. I was scared of what the armor would do to me. So, when I a teenager, I ran away to New York. But it turns out that I was followed... by that dreaded Hamato Clan. And him....
Yoshi's father, Hamato Yuuta, is a terrible, terrible excuse of a human being. Worse than me, if you can believe that. Him and his Hamatoes took me away and tortured me for months on end. Yuuta even went as far as to.... to... KARAI!??! ARE WE DONE YET?!?!
K: *sigh* Yes, Mom. I'll finish the story for you.
S: GOOD! Now, if you'll excuse me, I have a world to take over!
K: So, even though the Hamato Clan took almost everything from Oroku Saki, they did leaver her with two gifts: me, and her rage....
K: But, to more directly answer your question, I'm Yoshi's half-sister.
S: *from a distance* KARAI, WE TALKED ABOUT THIS. YOU ARE MINE AND MINE ONLY!!