Maria is the supervising teacher of the Neighbor's Club (in name only) and she is a ten-year-old nun. While being exceptionally gifted in academics, she can also be very rude and immature when annoyed.

Height; 136 cm; Weight; 33 kg.

Maria has blue eyes and long lavender-silver flowing hair. She wears a nun outfit, which consists of a dark-blue one piece dress with a white collar design of two long triangles and dark blue Cornette with a heart decoration. Maria also wears a necklace with a key.