Rocket-sensei mentors three aspiring demon idols, providing structured instruction through lectures. This guidance balances kindness with occasional strictness, steering the protagonists toward their goal. Rocket-sensei focuses on teaching idol fundamentals to address their beginner-level understanding, while consistently correcting their missteps and deviations during training. This mentorship forms the central framework for the protagonists' development. Rocket-sensei's personal background, motivations, and any character evolution remain undefined within the documented media, as do any expanded appearances in spin-offs, movies, OVAs, or other extended media.