Kirigaya Suguha (桐ヶ谷直葉, Kirigaya Suguha?), known as Leafa (リーファ, Rīfa?) in «ALfheim Online» (ALO), as well as «Project Alicization», where she had temporarily used the Terraria (テラリア, Teraria?) account, is the deuteragonist of the Fairy Dance Arc, one of the main characters of the Girls Ops spinoff, and a reoccurring character throughout the Sword Art Online series. Suguha is the cousin and adoptive sister of Kirigaya Kazuto, but was raised along with him as his sister. In order to protect Kazuto from the wrath of their grandfather when he decided to quit kendo, Suguha became an accomplished kendo practitioner in his stead. While Kazuto was trapped in Sword Art Online, she became interested in seeing the virtual world that he loved, thus she began playing a Virtual Reality Massively Multiplayer Online Role-Playing Game (VRMMORPG) called ALfheim Online as a Sylph warrior, after consulting Nagata Shinichi (Recon), the person with the most experience on games in her class. Her obsession with flight in the game has earned her the nickname «Speedaholic» (スピードホリック, Supīdohorikku?) from Recon.