Kirigaya Suguha was raised with Kazuto as his sister since her parents took Kazuto in after his parents died in a traffic accident. Kazuto is Suguha's first cousin; his mother and Suguha's were sisters. They were taught kendo by their grandfather, who was a former policeman and a kendo champion. Kazuto gave up after two years and embraced the world of technology, leaving her behind. Kazuto found out he was not her real brother around this time and the distance between them became further and further apart, until they were practically strangers before the SAO Incident. She continued with kendo and became a national quarter-finalist. Child Suguha practicing Kendo as a child.Suguha originally disliked VRMMO games for it hid peoples' nature and reality, as it did with Kazuto. She took up ALO in order to understand Kazuto better when he was trapped in SAO. She won the Sylph tournament, earning the title as the strongest Sylph before the events of the Fairy Dance Arc