Sachi

Sachi is a member of the Black Cats of the Full Moon, a guild whose members other than Kirito belong to the same high-school computer research club in the real world. She fights with a two-handed long spear and is lower level than most of her guildmates.

Afraid of monsters, Sachi never wanted to leave the Starting City but ultimately does so despite fearing she may die. Kirito sees similarities between them, describing both as socially awkward people who isolate themselves yet fear loneliness.