cometcaseyy
So like canon, Lou Jitsu came to save the turtles from Draxum's experiments or whatever. except he didn't actually escape from the fire.... HE HIMSELF escaped but wasn't able to take the turtles with him, instead they ended up wandering off and Draxum was only able to get ahold of leo and mikey; until getting info that both big mama and the foot clan had his two other "creations"
Growing up the turtles knew nothing of each other. Grew up with different names, different but slightly similar personalities, different everything! And Splinter was unsure of if he'd ever be able to save or see them ever again...
Lavender: Life living as someone who everyone called "the son of Big Mama" felt like a dream. Lavender has constant surveillance on him wherever he goes 24/7, and doesn't dare leave the Hotel. Though... sometimes he feels rebellious.
Three: Three was always having to live up to the impossibly high standards of his Master Draxum. he grew up around hatred and soon became almost exactly like Draxum. a brother? He hated four. He was three he was... he was blade. yeah.. and blade worked alone.
Red'Foot: Strength. Was that all he was good for? Red was always used for the more dangerous missions due to his ability and size, he grew up cold, but deep down inside was just a little turtle, scared of being alone. Red felt useless if he wasn't basically sacrificing himself for the foot, he had to. He was too loyal to simply up and leave.
Four: Four was soft, sure he was emphatic. That's what happens when you grow up with a parent and older brother who seemingly dislike you for almost basically living. Four knew he was strong, maybe his Master Draxum and Three didn't think so, but Four knew... Four was bound to the fate that he'd become a warrior one day, though he himself wished to be an artist.