Rakugan is an elderly cat, potentially as old as or older than Chiffon. He self-identifies and frequently presents himself as a master of magic. However, his actual magic consists of a few ninja-inspired illusionary tricks rather than genuine sorcery, with one signature technique being the use of smoke bombs for dramatic entrances or escapes. His primary narrative function is mentoring the protagonist Taruto as her apprentice, despite his limited practical expertise. He instructs her in specific spells, notably one called "Hail Tiger" or "Great Tiger Meow Meow." His well-intentioned guidance to Taruto is frequently unreliable, often leading to unexpected or unintended outcomes when she applies his teachings. His persistence in this mentorship underscores his belief in his own importance as a teacher. Visually, he possesses striking green hair and is often depicted wielding a staff, reinforcing his self-styled mystic image. His physical appearance includes prominent eyebrows. Beyond Taruto, he occasionally offers counsel to other characters, maintaining his role as a source of attempted wisdom within the group, though the efficacy of his contributions remains inconsistent. The documented media does not detail significant evolution in his background, personal history, or character development.