Danara Pel hologram

Danara Pel's holographic body

Vidiian program Alpha was a holoprogram created by The Doctor in 2372 to give Danara Pel, a Vidiian suffering from the Phage, the ability to live in a healthy body. He did this by transferring her synaptic patterns to the holobuffer.

While Pel lived in this body, she and The Doctor enjoyed each other's company. (VOY: "Lifesigns")