シグマ・セブン
is a Japanese stage actress and voice actress from Ōta, Tokyo. She is a graduate of the College of Fine Arts at Nihon University. She then moved to Sigma Seven in 1991, and on July 1, 2003, she moved to her current agency, REMAX. From 1987 to the beginning of 1989 her roles were credited under her real name (渕崎 有里子) - the reading is unchanged.