Like Alex, Billy is born out of Reblika’s imagination.
She’s a digital portrait created by Reblika founder Mao-Lin Liao for his independent art exhibition Perfect Imperfections. To challenge himself, Mao-Lin created Billy from scratch.
Notice how she is looking straight at you? 
Mao-Lin specifically focused on the eyes. Each eye is actually a separate 3D object, which allowed him to apply great detail, such as the layered iris and lifelike reflections.