Alexei Strasser serves as administrative counselor to Crown Prince Christopher Selkirk Ashelard, acting as a key aide who manages the prince's duties and official workload. He is the son of a duke, with some sources alternatively designating his family as marquis rank. His physical traits include distinctive black hair and gray eyes.

Renowned for a cold and distant demeanor—particularly toward women—he bears nicknames reflecting his aloofness: "Ice Lord" from Prince Theodore Warren Ashelard, "Ice Demon" from Lord Glen Eisenach, and the epithet "Ice Prince." His personality combines a rigorous work ethic with unwavering seriousness toward responsibilities. He exhibits persistent frustration at Christopher's neglect of obligations, frequently monitoring the prince to ensure task completion.

Professionally, Alexei routinely assigns duties to Lady Elianna Bernstein, leveraging her assistance when annoyed by Christopher's conduct and effectively deploying her as an errand runner during such instances. Artist Yui Kikuta noted significant challenges in depicting this character.