Description
Retsuko, nicknamed Death-Metal Retsuko, is an anthropomorphic 25-year-old red panda working in accounting at Carrier Man Trading Co., Ltd. Her full name combines "retsu" (烈), meaning "fever," "fervor," or "rage," and "ko" (子), meaning "child," mirroring her inner fury. Daily, she presents as timid, polite, and softly spoken, enduring workplace frustrations like sexism, overwork, and condescending superiors such as Director Ton and Tsubone while striving to be a "model employee." Privately, she vents her intense rage through death metal karaoke. During these sessions, her appearance transforms: she wears corpse paint, her eyes glow blue, her teeth sharpen, her tongue becomes devilish, and the kanji for "rage" (烈) appears on her forehead.

Her character evolves significantly. Initially bottling emotions and avoiding confrontation, she begins self-acceptance after colleagues Director Gori (a gorilla) and Washimi (a secretary bird) discover her death metal singing and encourage her. Their friendship fosters growing confidence and assertiveness. Romantic relationships further her growth. A brief relationship with the aloof Resasuke ends due to his emotional detachment. Later, she dates Tadano, an AI entrepreneur opposed to marriage and tradition; they break up when Retsuko realizes she desires marriage and family. Her most pivotal relationship is with Haida, a hyena coworker harboring long-term feelings. After initial rejections and awkward dates, they bond through honest conversations, including a karaoke confrontation expressing suppressed emotions. When Haida becomes involved in corporate fraud, Retsuko slaps him, condemning his actions while affirming his importance, catalyzing his redemption. They eventually cohabitate, navigate familial challenges like meeting Haida's authoritarian father, and marry during her political campaign.

Her pursuit of fulfillment extends beyond romance. She explores entrepreneurship with high school friend Puko but declines due to financial instability. She briefly joins the pop idol group OTMGirls, befriending the demanding Manaka, but leaves after recognizing the industry's superficiality. In Season 5, surviving an assassination attempt linked to Haida's family, she runs for Japan's National Diet, publicly leveraging her death metal persona to channel voter frustration and advocate for change. This marks the full integration of her dual identities, using rage for societal impact.

Family dynamics also shape her. Her mother pressures her about marriage and cleanliness, symbolizing societal expectations, while her calmer father trusts her judgment. Their interactions highlight generational clashes with underlying care. Her death metal singing evolves from a secret coping mechanism into a public tool for authenticity and empowerment, reflecting her journey of balancing societal compliance with self-expression.