The Architect

The Architect was a Timelord Identity the Thirtieth Master assumed while hiding form the Doctor.

Creation
When the Thirtieth Master came up with a plan to crush the Doctor once and for all, he decided it would be best for himself to assume an identity in order to get close to the Doctor and gain his trust. He needed to make sure the Doctor did not realise his true identity, and instead of risking a Chameleon Arch, he instead made a deal with the Second Oracle to remove some of his memories [AUDIO: The Deal], encasing them within the confines of a Gallifreyan fob watch, and intern, hide many others within his subconscious. The Oracle had to make sure that he believed the lie, and intern, he made plans to encounter his previous incarnation - striking a deal with him, the 29th Master, so that they could both rule the universe together in the Doctor's demise.

He would make sure that his memories were secure by giving them to the 29th Master, and inter, await his rebirth when it was time to begin the final phase of their plan. Earlier he made a universe within his own cane that the 29th Master would trap him within, upon his own orders. They would do this so that the Thirtieth Master was always assured to meet the Doctor, and not wander away from the original plan, without the Thirtieth Master knowing any different when he assumed the mantel of the Architect.

Biography
According to

Legacy
Just like when the Tenth Doctor (David Tennant) became John Smith, the Architect retained all his memories of when he was the Architect, although, upon his rebirth as the 30th Master, the Architect was for all intents and purposes dead.

Psychological profile
The Architect was far more overtly emotional than the 30th Master, whose actions were cold and ruthless. The Master's personality was hard and psychologically unstable. As the Architect, he lived these memories painfully daily and intern, he was more emotional because of them.

Skills and abilities edit
Though wholly human, The Architect displayed some skills unusual for a timelord of his type As the Architect he did alot of good, so much so, that the Doctor seemed proud of him. There were many appearances of quick-thinking and quick, sure-footed movement, which was heavily implied to be his Time Lord instincts seeping through when he saw someone in imminent danger, and this disguised his true intentions perfectly.