Karen: The suit has a built-in A.I. named Karen, similar to Tony Stark ’s F.R.I.D.A.Y., that informs Spider-Man on changing tactical situations and provides diagnostic reports. This feature was initially set to activate after Parker completed the Training Wheels Protocol, but Ned Leeds unlocked it with the rest of the suit's abilities. Karen records and stores data while the suit is in use through the Baby Monitor Protocol, allowing Spider-Man to access a personal database and review information he may have overlooked previously, or to research people or events he has previously encountered. Karen also provides suggestions and activates features autonomously, such as when she enabled the suit's 'Enhanced Reconnaissance Mode' when Parker needed help surveying a couple of criminals.
Halloween costumes are costumes worn on or around Halloween, a festival which falls on October 31. An early reference to wearing costumes at Halloween comes from Scotland in 1585, but they may pre-date this. There are many references to the custom during the 18th and 19th centuries in the Celtic countries of Scotland, Ireland, Mann and Wales. It has been suggested that the custom comes from the Celtic festivals of Samhain and Calan Gaeaf, or from the practise of "souling" during the Christian observance of Allhallowtide. Wearing costumes and mumming has long been associated with festivals at other times of the year, such as on Christmas. Halloween costumes are traditionally based on frightening supernatural or folkloric beings. However, by the 1930s costumes based on characters in mass media such as film, literature, and radio were popular. Halloween costumes have tended to be worn mainly by young people, but since the mid-20th century they have been increasingly worn by adults also.