Being of an older age, Westcott followed ways of thinking which might have been considered old-fashioned at the time of the Golden Dawn. In disagreements with Mathers, he advocated traditions and the need to compromise over Mathers' desire to progress even if it meant entering areas considered heretical. Westcott was intent on maintaining his social standing and wanted his cabal to have history with an academic or royal scholar, which led him to forge a letter from Anna Sprengel to give the Golden Dawn more prestige.
Westcott's magical ability was said to be not all that great compared to the likes of Samuel Liddell MacGregor Mathers and Aleister Crowley, however he still controlled a powerful faction in the Golden Dawn as one of its Three Founders.
This was in part due to possessing a form of quasi-immortality. He maintained this state by distorting the circulation of his life using the attraction of an extremely great being. When describing it, the recreated Mina Mathers omitted the exact details but mentioned Westcott's specialty in forging documents (having forged a letter from Anna Sprengel when creating the cabal to give it more prestige), his access to corpses as a coroner and how parchment was used to converse with demons and transfer souls. A red mass in the center of his chest apparently contained Westcott's soul. Though he never had doubts in it, this quasi-immortality didn't save him from death at the hands of Imagine Breaker.
Westcott also had medical experience and capabilities as a coroner of Scotland Yard. It can be assumed that Westcott has some degree of alchemical knowledge, being described by Mathers as having brought Alchemy back at the end of the 19th century.
- The real William Wynn Westcott was a ceremonial magician and coroner who co-founded the Hermetic Order of the Golden Dawn together with Samuel Liddell MacGregor Mathers and William Robert Woodman. He was later forced to cease his public association with the group due to its growing notoriety and his position as a Crown Coroner, though he secretly continued his involvement and would later be involved in one of its successor organizations, Stella Matutina. He was also a chief of the Societas Rosicruciana in Anglia. After retiring as a coroner in 1910, Westcott emigrated to South Africa in 1918, dying in Durban in 1925.
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Shinyaku Toaru Majutsu no Index Light Novel Volume 18 Chapter 3 Part 4
- ↑ 2.0 2.1 Shinyaku Toaru Majutsu no Index Light Novel Volume 18 Chapter 3 Part 6
- ↑ 3.0 3.1 Shinyaku Toaru Majutsu no Index Light Novel Volume 18 Chapter 3 Part 9
- ↑ 4.0 4.1 4.2 4.3 4.4 Shinyaku Toaru Majutsu no Index Light Novel Volume 18 Chapter 3 Part 13