Err, ok, here we go. Takeo's thesis had something to do with genetic manipulation involving animal DNA being used to help people recover from bad injuries, or help improve some kind of bodily function. Balkov, masquerading as a curious and philanthropic scientist (somethinglike how he approached Takao's dad?) was among those who heard about it, and offered Takeo a job in his 'lab', to help him do further study for that thesis and such.
The twins weren't test-tube babies, though - man, I need to change this in her bio 'cause I got it mixed up with another of my OCs - they were already...three by the time the manipulation was done, and only because Kei didn't want Katou to get sick anymore (lol protective 3-year-old). Which still tied in to her dad's thesis, because his main point was how to succeed, safely and ethically, in manipulating someone's DNA without experimenting on unborn fetuses. Of course, Balkov would twist that into his own kind of experiment, engineering bladers so that they're super-humanly fast or strong or whatever, and all for world domination rather than to actually help them.
WHOO that got a little long OTL I hope that clears things up??
Aww that's cool. Tari hates being called her full name, she doesn't let many people use it
I shall, I'll probably do it for Ryo as well and maybe some of my other OCs, it will give me an excuse/chance to draw their bit beasts