Albert Chamomile, universally known as Chamo, is a talking ermine distinguished by white fur, black eyes, four large whiskers, and a long prehensile tail tipped in black. His history began when Negi Springfield, aged five, freed him from a trap, forging a long-standing bond. Chamo frequently turns to Negi for help escaping trouble. While he presents himself as Negi's advisor and protector, Chamo operates with self-serving motives, including dodging legal repercussions for crimes like stealing over 3,000 pairs of girls' underwear. To evade arrest, he became Negi's familiar under the false pretense that the thefts were meant to warm his sick sister. Chamo displays a dual nature: demonstrating genuine care for Negi's safety while simultaneously exploiting their relationship for personal profit. A primary scheme involves arranging "probationary contracts" (Pactios) between Negi and his students, earning 50,000 Ermine Dollars per contract. Notable manipulations include rigging a "Kiss Negi" game with a hidden magic circle during a Kyoto trip, leading to both successful and botched Pactios. He also actively monitors and mediates emotional conflicts among Negi's students, particularly their romantic feelings toward Negi, often irritating them. His perverted behavior, especially lingerie theft, routinely provokes violent retaliation from Asuna Kagurazaka. Magically, Chamo specializes in practical spells rather than combat. His expertise lies in drawing Pactio magic circles and casting anti-telepathy wards. Though his overall magical power is limited compared to others, he shows resourceful improvisation, like creating the "Ermine Flash" by igniting flash bangs with his lighter for distractions. He also possesses non-magical skills like computer proficiency, notably ordering items from "mahou.net". In broader media, Chamo appears in the AWA fictions as Negi's assistant and is slated for future XP4 storylines. Within "UQ Holder!", he appears as an elderly gentleman whose behavior remains consistent, including stealing underwear. He serves as a judge in the "Mahou Sensei Negima! Revival Special" Miss Mahora championship. The "Negima!?" adaptation tones down his perverted traits, though he still incurs Asuna's wrath. His name, combined with Negi's, references the Japanese saying "kamo ga negi wo shotte kuru" (a duck bearing green onions), symbolizing unexpected good fortune. Trivia notes his friendship with Chachazero, including their occasional drinking outings. Chamo uses specific honorifics: "Aniki" (big brother) for Negi and "Ane-san" (big sister) or variants like "Jochan" for female students, despite likely being older. His character remains consistent across timelines and adaptations, maintaining his role as a comedic yet morally ambiguous figure tied to Negi's journey.