Maria Takayama is a supporting character in the series Boku wa Tomodachi ga Sukunai, including the Add On Disc original video animation. She is a ten-year-old nun who serves as the supervising teacher and moderator of the Neighbors Club at St. Chronica's Academy. Despite her young age, she is a child genius with exceptional academic abilities. However, her personality is marked by rudeness and immaturity; she frequently uses expletives when annoyed and has a habit of referring to others as rotten mandarin. Her gullible nature often leads others, particularly Yozora Mikazuki, to take advantage of her. She develops a sibling-like relationship with Kodaka Hasegawa, who regularly prepares packed lunches for her, and she becomes affectionate toward him. A key development in her story arc occurs when it is revealed that she was never an actual teacher or a nun at the school. This revelation nearly causes the disbandment of the Neighbors Club, but Sena Kashiwazaki intervenes by calling her father, resulting in Maria being appointed as a special part-time teacher. This turn of events strengthens her commitment to the club. Maria does not possess any supernatural abilities; her role in the story is to provide emotional support and comic relief through her childlike sincerity and innocent misunderstandings, while also fostering connections among the club members. Her notable trait is her ability to bring warmth and humor to the group despite her occasional rudeness.