Sigils represent things from a special cross, to that of Hebrew alphabets. The lines used in a sigil are used to display a word. However, it is most often used to display a name of an angel in order to obtain Telesma. What the sigil draws out depends on the angel the sigil represents, like Archangel Gabriel representing the direction of south, which the spellcaster may use to tell others which direction to go.
What they represent seem to imply that they can also be used in magic circles, for when writing the name of the angel whom the spellcaster desires to borrow the from, among other functions, instead of regular alphabets.
As Silvia demonstrates, there is no reason for a sigil to be solely written on paper or on the ground - they can also be formed through various movements, like using a rope to signify the sigil of Archangel Gabriel.
A common tool used by both members of the Rosicrucian Order and the Golden Dawn is a rose cross medal, which acts as an all-purpose spiritual item that can mass-produce sigils, extracting the name of an angel or spirit by spelling it out in one stroke. Each of the rose's petals has one of the 22 Hebrew letters engraved on them.
Toaru Majutsu no Index
Toaru Majutsu no Index: Mars SS
- Main article: Toaru Majutsu no Index: Mars SS
Toaru Majutsu no Index: Kanzaki SS
- Main article: Toaru Majutsu no Index: Kanzaki SS
During the confrontation between Kanzaki Kaori and Leivinia Birdway as the two were going after Orlentz Trice and losing their tempers, Birdway ordered Mark Space to bring her a magic sword, intending to take Hebrew text from a cross medal and draw a sigil to use against Kanzaki.
Toaru Majutsu to Kagaku no Ensemble
- Main article: Toaru Majutsu to Kagaku no Ensemble
Shinyaku Toaru Majutsu no Index
Ichihanaran Festival Arc
- Main article: Ichihanaran Festival Arc
- Main article: Coronzon Arc
During the events surrounding the Crowley's Hazard invasion of the United Kingdom, it was mentioned that sigilized names might be carved on surface of Ange Catacombs' autonomous suitcases. When accessing the internal 'contents' of the Anti-Art Attachment's components, Coronzon recognized that there were ordinary sigils incorporated into them.
- Shinyaku Toaru Majutsu no Index Light Novel Volume 06 Chapter 7 Part 7
- Toaru Majutsu no Index: Mars SS
- Toaru Majutsu no Index Light Novel Volume 09 Chapter 2 Part 9
- Shinyaku Toaru Majutsu no Index Light Novel Volume 22 Epilogue
- Toaru Majutsu no Index SS: Kanzaki Chapter 6 Part 3
- Toaru Majutsu to Kagaku no Ensemble Magic (Hidden) Story
- Shinyaku Toaru Majutsu no Index Light Novel Volume 20 Chapter 1 Part 1
- Shinyaku Toaru Majutsu no Index Light Novel Volume 21 Chapter 3 Part 1