Ptera (portrayed by Cecile Callan) was a minor character who appeared in the Star Trek: Voyager episode "Emanations". A member of the Vhnori race, she was dying from a brain tumour and, in accordance with her people's customs, chose to be euthanized inside a coffin-like device that would have also transported her body to an asteroid orbiting her planet. She was accidentally transported to USS Voyager after her death and the Doctor was able to revive her, but this action shook her belief in the Next Emanation, which was the Vhnori version of the afterlife.
When the Vhnori die, subspace vacuoles take their bodies to the next realm. When she discovered that the vacuoles were found on a deserted asteroid, it was very difficult for her.
Ptera asked to be sent back even if it meant her death. When Voyager tried to beam her back in another vacuole, it did not work, and she died.