"Heart"

The robots were made for ill people. When a person reached an illness unable to cure, they injected them with a Brevital sedative, then proceeding to transfer their life, energy and appearance into a blank robotic slate. Fixing looks, personality traits and horribly adapted emotions, scientists created the animatronics.
That was until lead scientist Len, moved by the appearance of a young ill girl, Rin, created an animatronic girl with the first ever computerized heart.
A 'special' program.

"I'm not an Aries. I'm not a Taurus, Gemini or a Cancer. I'm not a Leo either, nor am I a Virgo or a Libra. I'm not a Scorpio or a Sagittarius, or a Capricorn, Aquarius or Pisces. Because I wasn't born. I was made, wasn't I?"