'Half-Blood Prince' opens in Boston

From left: Persia Avarakshi (Severus Snape), 22, Alex Phillips (Sirius Black), 21, Hava Asvarakshi (Lavender Brown), 15, Emma Zaenglein (Bellatrix Lestrange), 15, all of Boston.
From left: Persia Avarakshi (Severus Snape), 22, Alex Phillips (Sirius Black), 21, Hava Asvarakshi (Lavender Brown), 15, Emma Zaenglein (Bellatrix Lestrange), 15, all of Boston.
Taylor Adams/Globe Correspondent