Astrid is a kind, short bookworm who is very intelligent but quite quiet, and she is usually found tucked away in the library between classes. She prefers the calm of books to loud crowds, finding comfort in their predictability and order. She has a few close friends and is perfectly content with this small circle, valuing loyalty and understanding over popularity.

For the most part, Astrid is OK, but she occasionally experiences panic attacks or sudden waves of anxiety. These moments are infrequent and usually well hidden, rarely interfering with her day-to-day life, though they leave her drained and thoughtful afterward.

Astrid comes from a single-parent household, raised by her Muggle mother, who is deeply loving and protective. At her previous school, Astrid was bullied relentlessly, which severely damaged her self-confidence and left her without any true friends. During that time, books became her refuge, offering escape, safety, and companionship—a habit that continued into her life at Hogwarts. She rarely speaks about her family aloud, but she writes home often, pouring her thoughts into letters she never quite says out loud.

Astrid was once at school, being picked on as usual, when she dashed toward a bookcase to hide—and suddenly found herself on top of it. For this unexplained incident she was suspended, much to her mother’s frustration, though Astrid herself was left more confused than angry.