Guidance

 was the Eutermesan leader of the Church of the Foundation and the father of the Doctor's companion C'rizz.

History
Guidance was the spiritual leader of the Church of the Foundation in zone Eutermes on Bortresoye. When the Kromon attacked, C'rizz assumed he was dead. In reality, Guidance had survived the incident and had been recruited by Daqar Keep to find the site of the original Foundation to which Guidance possessed half the key (C'rizz holding the other half).

Not wanting the secrets of the Foundation (in reality Rassilon's Foundary) to fall into Keep's hands, Guidance pretended to take a long time to find the Foundation (a fact that Keep and Perfection were aware of but unconcerned about). When the TARDIS crew arrived, Guidance approached his son and told him the secrets of how the Eutermesans' personalities change to suit the people surrounding them and of how the whole universe was an endless cycle. Then he "purged" the supposedly blasphemous ideas that C'rizz had picked up from the Doctor and Charley Pollard by repeatedly forcing his son's head underwater, almost killing him.

Thinking that C'rizz was now on his side (he was in actuality working for Rassilon) Guidance went with C'rizz to the Foundation to await the Doctor and Perfection, as she had stolen Guidance's half of the key. Shortly after entering the Foundary, Daqar Keep forced his entry and murdered Guidance by creating a pair of vultures out of his body that tore Guidance's eyes out. He died proclaiming that all he had done was right.

At some unknown point in C'rizz's childhood, Guidance and the other members of the Foundation turned him into a vessel for the minds of everyone he killed.

Personality
The Eutermesans were created so that they would be easily influenced, a fact that Rassilon used to his advantage in plotting his escape from the Divergent Universe and as such, Guidance was a religious zealot. In entering the Foundation he believed that he would be meeting his creators. Putting the Church above all else, he almost killed his own son when C'rizz started thinking that the Foundation was not all Guidance claimed. He almost openly despised Daqar Keep even though (or because) Keep had bought out the Church. He also disliked Perfection, calling her the Doctor's whore on one occasion. Presumably he knew about Keep's powers but this only lessened his opinion of the creature, an arrogance which lead to his death.

Unlike most other Eutermesans, Guidance was aware that their species' personalities moulded to fit the people around them, yet it still never occurred to him that he was being manipulated (by Rassilon who was the original creator of the Church). He also knew that the most adept Eutermesans could not only change the colour of their skin but also their texture. Being highly adept himself, he was able to camouflage himself to the point of almost being invisible, even to his son's eyes.