Cho-Je

Cho Je was the assistant of K'anpo Rimpoche while he lived as a Buddhist abbot on late 20th century Earth. In reality, he was a projection of K'anpo's future incarnation

Biography
When K'anpo was struck down by the Eight Legs possessing his own meditation students as human hosts, Cho Je faded into nothingness and then re-appeared, taking the place of K'anpo Rimpoche. He had regenerated. The Time Lord corrected Tommy when he addressed him as "Cho Je", maintaining that he was K'anpo. (TV: Planet of the Spiders)

Behind the scenes

 * Cho Je seems to have a similar function to a Watcher merging with its Time Lord.