Sakaki functions as trusted advisor to Crown Prince Raji Shenazard of Tanbarun, maintaining a constant presence at the prince's side. He provides steadfast guidance, counsel, and supplementary protection.

Physically in his late twenties to early thirties, Sakaki possesses gray eyes and navy hair sharply streaked gray on top. He typically wears a black and gold uniform beneath a long gray cloak. In his youth, he wore his hair long and tied into a narrow ponytail.

Sakaki exhibits a calm, level-headed, and patient demeanor. He consistently intervenes to temper Prince Raji's impulsive tendencies and rash decisions, demonstrating deep concern for the prince's public image, actions, and overall well-being. His loyalty and consideration define him as a trustworthy figure dedicated solely to Raji's interests.

His history reflects longstanding service to the Tanbarun royal family. Sakaki assisted in raising the royal children before his specific assignment to Prince Raji when the prince was five and Sakaki sixteen. His personal life remains largely private, as his existence revolves entirely around his duties to the monarchy.

Key relationships shape his role: Sakaki serves Raji with unwavering loyalty, partners operationally with Mihaya, and maintains a respectful friendship with Shirayuki following her interactions with the Tanbarun court. His steady influence contributes significantly to Prince Raji's gradual maturation from a self-centered ruler into a more responsible leader committed to his kingdom's welfare.