Astarion is a high elf rogue companion in 'Baldur's Gate III.' Once a magistrate in Baldur's Gate, he was transformed into a vampire spawn by Cazador Szarr and endured centuries of servitude. The illithid tadpole has granted him the ability to walk in daylight, offering a chance at freedom. Throughout the game, Astarion's personal quest, 'The Pale Elf,' involves confronting his past and seeking autonomy from his vampiric master.