TV-Series
Description
Ichî (also spelled Ichii) is a fifteen-year-old male at the series start, born November 11 with blood type O. He comes from a poor background, raised alongside his older stepsister Sarasa, for whom he initially held romantic feelings. During this time, he exhibited delinquent behavior and manipulated others financially.

His life shifts when he encounters Zero, who witnesses Ichî fighting other sorcerers and demands to become his magic exam partner. Ichî reluctantly agrees, partly intending to exploit Zero's wealth. Their partnership solidifies after combining powers to defeat a formidable enemy, forging a deep friendship that transforms Ichî into a generally kind, patient, and polite individual who prioritizes others.

Specializing in defensive magic and holding exam number 001, Ichî's primary duty becomes protecting Nina Yamada, a human girl who accidentally swallowed the crucial Crystal Pearl. He and Zero enroll in her school, with Ichî secretly residing in her closet for her safety. He develops romantic feelings for Nina, creating a love triangle, but ultimately steps aside when she chooses Zero. Ichî explicitly states loyalty to Zero would prevent him pursuing Nina even if she reciprocated.

Two years later, at seventeen during the Advanced Magic Exam, Nina accidentally swallows another magical artifact, the Crystal Drop, requiring Ichî and Zero to protect her again. Ichî occasionally flirts with Nina during this period to provoke jealousy in Zero and mend their conflicts.

Ichî displays remarkable patience, managing Zero's outbursts, Nina's distress, or Rokka Wan's persistent affections. Despite his gentle demeanor, he exhibits intense anger when deeply provoked, such as towards the head of the Advanced Magic Exams for attempting to cancel the exams to access Sarasa, or when Zero and Nina repeatedly lose Crystal Drop fragments due to romantic distractions.

His romantic conclusion involves Rokka Wan, a five-year-old witch who relentlessly pursues him using transformation magic. Though initially indifferent, their relationship evolves. By the first series epilogue ten years later, Ichî acknowledges his feelings, intervenes to stop her marriage to another, and seeks her father's permission to marry her. The second series epilogue shows them married with a daughter named Itsuki.

Post-exam, Ichî and Zero become Magical Police Officers, leading them back to the human world where they maintain contact with Nina. Pearl, Nina's dragon familiar from the Crystal Pearl, resides with Ichî in the magical world during his adulthood.

Ichî has unnamed parents and a stepfather. Through Sarasa's marriage to Jeff (Zero's older brother), he gains a step-brother-in-law and step-nephew, Jean. He possesses cooking skills, enjoys preparing meals for others, and communicates with animals. His name derives from the Japanese word for "one" (ichi), reflecting his status as the second character created. He attracts significant female attention, resulting in a fan club dedicated to him and Zero.