well the alpha AI was based on The director, Tex was based on the women he loved, so in the same way alpha loves tex, but tex is based on a women who died, so she will always die in the end.
but indeed, tex that he forgot in the capture unit wasn't the real tex, she was just another version of the real tex created by the alpha, but as seen in season 9 (the animations) episode 10 introductions when tex got shot she didnt bleed, there were sparks so there she already was a android.
and tex was based on alice, a women he lost in battle, so tex is not a real person to begin with