Jessica is an anthropomorphic cat and a main character in the corporate comedy series. She works as an office lady in the merchandising department of the Line Corporation, where she is known for being a perfect, elegant, and impeccably professional employee. Her glamorous and confident demeanor, coupled with a high-maintenance streak, often adds a touch of sophistication and occasional chaos to the office environment. In the early stages of the series, she is also characterized as being quite sharp-tongued.

On a personal level, Jessica joined the company at the same time as Cony, a cheerful and sometimes overly emotional rabbit, and the two have become close friends who also spend time together outside of work. Despite being the more composed of the pair, Jessica often finds herself drawn into troubles and misunderstandings due to Cony's clumsiness. She harbors a romantic interest in her colleague Moon, an eccentric and laid-back boss.

Within the office, Jessica has taken the initiative to start a chorus club. She is responsible for this choir, an activity in which she is the only active singing participant, as her sole other member is the silent and reserved bear, Brown, who merely provides a physical presence without actually singing. A minor but telling detail about her personality is how she has saved her department manager's contact information in her phone under an irreverent nickname, Mustache-Curly (HigeChororin).