Smokey

Smokey was a Shan'tee from the planet Wupatki who was in a symbiotic relationship with human colonist Allegra D'Angelo who suffered from synaesthesia meaning that she could better communicate with the Shan'tee despite them being conceptual beings of pure sound. Working at the Presley Foundation, Allegra was able to create an immersion field which allowed humans to see the Shan'tee and therefore greatly improved communication between both races allowing Wupatki to thrive.

When the Tenth Doctor and Gabby Gonzalez arrived on the planet they visited the Presley Foundation so that Gabby could see the Shan'tee in person. However, after meeting with Smokey and Allegra they soon discovered that the Shan'tee were being infected with the Nocturne virus which was mutating them into monstrous killing machines. As the Doctor attempted to figure out the infection's origin a herd of bovodrines began rampaging through the facility.

The Doctor deduced the virus was transmitted through the broadcasts from a space radio station. When he travelled there, Smokey stayed behind but created a duplicate of himself to go with the Doctor to help him. Once they arrived at the station, Smokey disabled the defenses and helped the Doctor stop the source of the virus. Back on Wupatki, he continued to assist the Presley Foundation and even defended Gabby when several humans became infected by the virus. When the Nocturnes were about to kill them, the Doctor returned and cured everyone of their infection. Smokey then gave Gabby a musical portrait of herself as a parting gift. (COMIC: The Singer Not the Song )