Thea Aster is a prominent character in the anime series 'Spy Kyoushitsu' (Spy Classroom). As a member of the elite spy team known as Lamplight, Thea is recognized for her composed demeanor and sharp intelligence. She often acts as a reliable strategist within the group, supporting her teammates in various espionage missions. Despite her serious exterior, Thea cares deeply for her friends and strives to prove her worth as a capable spy in a world full of intrigue and danger.