TV-Series
Description
Carlyle Chesterton, known as Mamoru Jinguji in the Japanese version, is a character from the anime Yu-Gi-Oh! Zexal II. He is a student at Heartland Academy, recognizable as the first character in the series to wear the third-year uniform, which consists of a white shirt with blue-lined sleeves and collar, a blue tie, blue pants, and brown shoes. He also has dark-brown hair with lighter-brown bangs, green eyes, and wears a sash around his left arm that signifies his position as the head of the student council.

By nature, Carlyle has a personality very similar to that of his fellow student Caswell Francis, as he fundamentally believes in adhering strictly to rules and regulations. This principled side is his genuine character, existing before any outside interference. However, his role in the story is largely defined by a period of manipulation. He is brainwashed by Girag, a member of the Barian Seven, and is given the powerful card Rank-Up-Magic Barian's Force to use in a specific mission.

Under Girag's control, Carlyle's personality shifts to show a jealous and underhanded side. He appears envious of Yuma Tsukumo, the protagonist, for the popularity Yuma gained after winning the World Duel Carnival. To act on this resentment, he devises a plan to discredit and defeat Yuma. He exploits his authority as student council president by appointing the disgruntled Caswell as a "special disciplinarian," tasking him with enforcing absurdly strict school rules that disrupt the lives of other students. This scheme is designed to lure Yuma into a confrontation.

When Yuma confronts him, Carlyle challenges him to a Duel, but with a crucial twist. He installs Caswell as the referee and insists that the match be governed by an arbitrary set of school rules that he manipulates to work only against his opponent. His motivation during this Duel is to prove the superiority of his strict, rule-based system and to punish Yuma for what he perceives as rule-breaking and undeserved fame. The Duel is the central focus of his role in the series, where he serves as an antagonist for a single episode.

Carlyle's key relationships are primarily with Yuma Tsukumo and Caswell Francis. His conflict with Yuma is the driving force of his appearance, serving as an opponent Yuma must defeat to restore order to the school. His relationship with Caswell is central to his plan; he manipulates Caswell's own rule-abiding nature and feelings of disappointment to turn him into an enforcer of his unjust system. This dynamic shows that despite their similar personalities, Carlyle under control is willing to pervert those shared values for a malicious purpose.

In terms of development, Carlyle experiences a clear arc within his single major appearance. He begins as a respected but brainwashed authority figure. During the Duel, he acts as a cunning and hypocritical villain, using his position to cheat. However, after Yuma manages to make Caswell see the unfairness of the situation, the duel's rules return to normal. Carlyle is ultimately defeated by Yuma. Following his loss, the brainwashing is lifted, and he returns to his normal, more disciplined and presumably benevolent self. He later makes a minor appearance during the Heartland Academy Festival, where he is seen performing his usual duties as student council president by monitoring registered and unregistered event booths.

Notable abilities possessed by Carlyle relate to his dueling strategy and his use of a Priest Deck. The central card of his strategy is the Xyz Monster Norito the Moral Leader. His entire approach in his Duel against Yuma is built on summoning this monster and then using his authority over Caswell to interpret the school's rulebook in a way that only penalizes Yuma's monsters and actions. He demonstrates the ability to use Rank-Up-Magic Barian's Force on his ace monster to perform a Chaos Xyz Evolution, summoning the more powerful CXyz Simon the Great Moral Leader. His other cards, such as Mirror Stage of Discipline and Surprise Inspection, are designed to control the field and enforce his arbitrary regulations, reflecting his character's obsession with order and control, even when that control is being used for corrupt purposes.