Tsubone is an office worker and a secondary antagonist of the Netflix Original series Aggretsuko. Her appearance is based on the Komodo Dragon. Tsubone makes Retsuko's work life a living hell by constantly piling her work onto her so she can leave on time, forcing Retsuko to work almost daily overtime. Tsubone is a sexist woman who treats her female co-workers poorly, often piling her own work onto them and talking down to them. On the other hand, she treats her male co-workers very well, blushing and sucking up to them when they talk to her, and sometimes even taking their work and passing it off to a female co-worker. This can notably be seen when Tsubone is talking to Ookami in the tea room at work and refusing to let Haida open her jar. Tsubone seems to particularly target Retsuko, telling her that she's lazy and does everything wrong. She will sometimes hide her true intentions behind faux sweetness, such as when she pretended to compliment Retsuko only to pile more paperwork on her already cluttered desk and then laughed maniacally.