Tebediatroculozan was a Time Lord. He was a member of the richest and most powerful houses on Gallifrey. He went to the Academy with the First Doctor, although they didn't know each other well.
He was ill during the Sontaran invasion of Gallifrey, and was monitoring lichen growth on Verana Delta when the Daleks invaded.
Tebediatroculozan had a bad case of envy, thinking he deserved to have the Doctor's adventures. He went to the Eighth Doctor, who gave him an experience that cured him of his envy. (PROSE: Seven Deadly Sins)