Max Sandshelt manages the Japanese branch of the American talent agency Jack O'Lantern and acts as the agent for Kasuka Heiwajima, who performs under the stage name Yuhei Hanejima.

He has fair skin, blonde hair, and prominent dark sideburns, and he is consistently dressed in a white suit, an appearance that often leads others to compare him to a typical Hollywood villain.

His personality is rambunctious and flamboyant. Though his demeanor may seem unreliable, he is skilled in the techniques and social abilities needed for management and is considered competent at his job. He exhibits a rowdy and blunt, childlike enthusiasm that frequently tires his subordinates, who often complain among themselves. Those closest to him understand that he is fundamentally a kind and thoughtful man, which allows them to tolerate his behavior.

In pursuit of his goal to recruit the Black Rider, Celty Sturluson, to his agency, he places a bounty on her to collect information. He often makes enthusiastic claims that his client can heal emotional scars, while positioning himself as the employer ultimately responsible for that healing.