Sanrio Aggretsuko also known as Retsuko, is a character that captured our hearts since the launch of her show on Netflix. She is a a lovable red panda who finds solace in heavy metal music and uses it as an outlet to express her frustrations. Retsuko is an office worker who navigates the challenges of corporate life. With a demanding boss, annoying coworkers, and mundane tasks, she often finds herself overwhelmed. However, Retsuko has a secret passion that sets her apart from the typical Sanrio character - heavy metal music. A fanart Sanrio progress bar for YouTube with Aggretsuko Retsuko.