Yeah, I knew, it's been scrapped.
Spoiler for Loldraft 2:
Chifuyu bit her lips as she read the medical report she received, specifically the genetic correspondence.
Though she felt a little guilty, it was strictly necessary. The moment she arrived in hospital as her sister called, she saw him. His face, it was a familiar sight, and yet different. And with him possessing an I.S., more question appeared.
Her best guess, he got that unit from Tabane. And Tabane don’t care anything other than Chifuyu or her own family members.
So she made a gamble, and signed the necessary inform consent for genetic checkup.
It took effort for her not to crumple the paper as she sighed. His overall genetic matchup is 50%, and skewed down due to gender bias.
With the advancement of medical technology, even before I.S. born, preservation of usable genetic sample that can last for years is possible… however, chances that he’s born in an artificial womb is quite implausible.
That boy shared exact same maternal genetic code with Ichika, which means they’re originated from exact same ovum, semi-identical twins.
Chifuyu frequently went with her mother to the gynecologist, and her mother’s pregnancy is quite normal. Ichika's factual twin sister is not even identical to her.
The only plausible -if remote and very contrived- explanation is that her mother gave birth to a triplet, and don’t say anything about it, THEN having this guy stranded somewhere, raised or conditioned to believe that he’s the real Ichika Orimura, and somehow get a hand on an I.S. as well.
The more she thought the more headaches she got.
This explanation shot down the "clone" and "artificial baby" theory, which mean the possibility of male Ichika exist is (almost) zero, why else the twin sister is fraternal while the boy and girl is semi-identical?