Kanon Maldini, who appears as the Red Queen in the Code Geass: Nunnally in Wonderland OVA, is originally a character from the main Code Geass series. In the original anime, he is introduced as a calm and highly capable man of 28 years who serves as the personal aide and right-hand man to Schneizel el Britannia, the second prince of the Britannian Empire and a primary rival to the protagonist Lelouch vi Britannia. His position is that of an Earl, reflecting his noble status within the empire. In the main storyline, Kanon is defined by his deep-seated and unwavering loyalty to Schneizel, a bond that is indicated to have originated from their time together in school. He is almost always seen at the prince's side, acting as a quiet, respectful, and efficient assistant. However, his loyalty does not prevent him from voicing his disagreements with Schneizel's plans. He notably expresses opposition to certain morally questionable decisions, such as the use of a weapon of mass destruction that would endanger innocent lives, including Schneizel's own sister. This portrays him as a man of integrity, not a sycophant. His personality balances his serious, clever, and sometimes cunning nature with a friendly and approachable demeanor. He also demonstrates a subtle sense of humor and is shown to be a comforting presence to other characters, such as the scientist Nina Einstein, during moments of grief.

In the specific context of the Nunnally in Wonderland OVA, Kanon Maldini is recast from his original role as a political aide to become the Red Queen. This Wonderland is a creation of Lelouch's Geass power, designed for his sister Nunnally, who finds herself in the role of Alice. In this alternate, dreamlike narrative, Kanon is depicted alongside Schneizel el Britannia, who assumes the role of the Red King, thereby maintaining their close partnership from the original series in this new context. This casting is a deliberate reversal from the traditional Alice in Wonderland tale, where the Queen of Hearts is the primary antagonist; here, the role is filled by a male character, Kanon.

The very limited information on the OVA specifically means there are no detailed records of the Red Queen's direct actions, dialogue, or personal motivations within the story. As a result, his character development and specific role in the plot of Nunnally in Wonderland are not clearly documented. No notable abilities unique to his incarnation as the Red Queen are specified in available sources. It can be inferred that his key relationship within this OVA remains with Schneizel as the Red King, mirroring the trusted advisor and companion dynamic from the original series. His personality as the Red Queen is not described separately, but given the nature of the OVA as a whimsical re-imagining, it is likely that the character retains the core traits of calm intelligence and dignified loyalty from his main-series portrayal while fulfilling the regal, commanding role of the Red Queen.