Marble Hornets (abbreviated MR) is a Youtube web series inspired by Slenderman online myths. The first video was posted on Youtube on June 20, 2009, following a post that its creator, Troy Wagner, created on the Something Awful forum on the previous day. It was one of the first webseries to be created around the character, with the first episode premiering exactly 10 days since the appearance of the original images of Slenderman on the Something Awful forums.

Tim Wright is one of the main characters of the 'Marble Hornets A.R.E. (Alternative Reality Experience)' and was a friend of Brian, one of the missing cast members, and also the personae Masky. He appears frequently and to date is one of the most mysterious characters in the series. Because of a chain of events that occur later in the series, Tim eventually becomes the central point of view.

Masky is notable for being one of the major driving plot devices in the series and being a recurring character. Masky's actions and the theories surrounding him have lead to the concept of proxies being created, although Masky himself (nor Hoody), have ever been stated to be proxies. It is also worth nothing that Masky actively works against The Operator meaning he would usually not be considered a proxy.

More Info: en.wikipedia.org