y4m4t0ls,brown hair, long hair, twintails, hair ribbon, purple eyes,ryouou school uniform,
The character Yamato Nagamori (永森 やまと) from the PS2 visual novel Lucky Star: Ryōō Gakuen Ōtōsai (らき☆すた ~陵桜学園 桜藤祭). She is a mysterious transfer student who transfers along with the protagonist, and only appears in that game.