Javik (Earth-4664)

The Didact, born Javik, is a Prothean Warrior-Servant who held an extremely high status in the Prothean society as protector of the Citadel, head of the Warrior-Servant rate and supreme commander of the entire Prothean military. He wholeheartedly believed in the Mantle the Protheans held to protect life, and fervently opposed the Halo Array as a sin beyond measure. He was also the lover and husband of the Librarian.

Originally thought to have been killed by the Master Builder, Faber, the Didact effectively existed as two individuals during the final days of the Prothean-Reaper War; his original self, as well as his implanted consciousness within a young Prothean known as Bornstellar. To differentiate these two incarnations, the original Didact was referred to as the Ur-Didact, while his other incarnation was known as the IsoDidact. The Ur-Didact was eventually exiled on Requiem, not to be awakened until 2557; meanwhile, the IsoDidact served until the final days of the Reaper conflict and was responsible for activating the Halo Array. After facing SPARTAN John-117, the Ur-Didact's biological form was destroyed under the combined power of several Composers. While he is considered "contained" by the Galactic Alliance Council, it is apparent his digitized consciousness survives.

Early Life
Born Javik, the Didact was a Warrior-Servant, the most powerful caste of the Protheans. He was trained by Vanqis, a legendary Warrior-Servant far older than Javik himself. Early on in his career, the Confirmer provided him a brevet mutation to a new form. He gained the name "Didact" while teaching at the Atrium of Defense of the Mantle; his students gave him the name because they found him to be a strict and demanding teacher.