Daneel is a character from the anime Majestic Prince, initially introduced as a mysterious young man with blue eyes and black, neck-length hair. His role is intrinsically tied to his identity as a Wulgaru, an alien species at war with humanity, but he is distinguished by his choice to defect from his kind.

His background is that of a defector and close associate of Theoria, another Wulgaru who has allied with the Earth forces. Together, they provide crucial assistance to the Global Defense Force, offering their advanced knowledge to aid in the development of the ASHMB mecha units, which are fitted with Wulgaru technology such as the JURIA System.

In terms of personality, Daneel is calm, analytical, and highly intelligent, often serving as a source of exposition regarding the inner workings of the Wulgaru. He displays a detached and clinical demeanor, showing little interest in interpersonal relationships or the affections of others, as seen when a character named Tamaki becomes infatuated with him without any reciprocation. His perspective is that of a scientist and observer, which aligns perfectly with his unique abilities.

Daneel’s primary motivation is to assist Theoria and the Earth forces in their fight against the Wulgaru. His actions are driven by logic and a desire to share vital information that could turn the tide of the war. His most critical mission comes during a collaborative operation on Mars. When a Wulgaru capital ship crashes on the planet, Daneel is escorted by pilots Asagi and Izuru of Team Rabbits to infiltrate the derelict vessel. His goal is to access and recover the ship's data, which holds vital intelligence about the enemy.

His role in the story is that of an informant and a living repository of knowledge. He is not a frontline combatant but serves as a strategic asset. His mission to the crashed ship reveals much about Wulgaru society, including their rigid class structure and their treatment of soldier caste members as expendable biological robots. This information directly impacts the series's central themes about the nature of free will, as the human protagonists confront uncomfortable parallels between themselves and the enemy clones they fight.

Key relationships define his place in the narrative. He is consistently paired with Theoria, acting as her assistant and ally; they are seen working together in the final stages of the war, launching into battle alongside the Earth fleet. Theoria entrusts him with personal tasks, such as choosing a location for a meal. He also develops a working relationship with the pilots of Team Rabbits, particularly Izuru and Asagi, whom he guides through the alien ship.

Daneel undergoes a subtle development as he integrates with the human forces. While he remains largely enigmatic, his value to the cause is proven beyond doubt. The information he memorizes from the crashed ship proves vital to the war effort, and he continues to play a supporting role in the final, decisive battle against the Wulgaru gate, actively working to keep the area clear for the main assault and later helping to retrieve survivors.

Daneel possesses several notable abilities that set him apart from ordinary humans and even other Wulgaru. He is heavily modified, which allows him to function as a living file system; he can "memorize" and store vast amounts of data directly from a crashed ship's computer, although this process requires time. His physical modifications are also extensive enough to allow him to breathe the thin Martian atmosphere without significant assistance. This combination of intellectual capacity and physical adaptation makes him an invaluable asset to humanity's struggle for survival.