Glospin

Glospinninymortheras (Glospin for short) was a cousin of the House of Lungbarrow. He spent most of his childhood bullying the Doctor

Biography
He was rather evil and twisted in his family, but was Satthralope's favourite and he disliked the Doctor. His behavior was largely disapproved by his Cousin Innocet. When he was young and when the Doctor was disowned and cast out working at a lowly position in the Capitol, Glospin comes to gloat over his Replacement by Owis. He claimed to have found genetic anomalies in the Loom records which prove that the Doctor did not belong to the House of Lungbarrow and he presented this proof to the Prydonian Chapterhouse. With this, the Doctor would be executed as a Loom-jumper and Glospin would secure his birthright. The Doctor furiously attacked Glospin and as they fought, the Hand of Omega appeared and drove Glospin off, leaving a scar not even his later regeneration could heal.

He then took a genetic sample from the Doctor, returned to Lungbarrow and took the form of the First Doctor and murdered Quences in order to frame the Doctor for his murder, so that he could subvert Quences' will and become his successor as Kithriarch instead of the Doctor. Glospin had Owis kill Arkhew and both actions led the House of Lungbarrow to be buried and forgotton for 673 Years. When the Seventh Doctor returned to Lungbarrow he found Glospin locked in the stove and there was a moment of instant mutual recognition and hatred between them, probably because of what had occured in the past and Glospin believed that the Doctor had finally returned to gloat over the situation he left his Family in. The Doctor was then accused of murdering Quences and Arkhew. When the Doctor rejected his inheritance and the furious house struck out at him, Glospin attacked the Doctor, who had ruined his family with Satthralopes key. Lungbarrow toppled over the cliff with Glospin still inside, unconscious. (NA: Lungbarrow)

Personality
Glospin was a very twisted and evil person and a very superior character, who intends to have things for himself. For example, to become Quences' successor as Kithriarch instead of the Doctor. He seems to indeed hold a personal hatred for the Doctor and could be considered an enemy. He also seemed to have brainwashed Owis into murdering Arkhew and took the form of the First Doctor to murder Quences, framing the Doctor.