A Barzan doctor found aboard the seed vault ship USS Tikhov in 3189, trapped out of phase and unable to accept that his wife and daughters have died beside him.
Doctor Attis appears in Die Trying. Discovery is sent to the Tikhov, whose care rotates among Federation member worlds, to obtain a plant sample needed to cure a group of sick Kili refugees. The Barzan family then on watch has stopped answering.
The boarding party finds the ship overgrown and Attis flickering in and out of sight. A coronal mass ejection struck while he was beaming aboard, killing his family and leaving him partly out of phase. He has been trying to revive them ever since.
Culber and Burnham restore him and Nhan, a fellow Barzan, persuades him to release the sample. Already dying of radiation exposure, he chooses to stay with his family, and Nhan remains to take the ship home to Barzan.