Sasako works as a waitress at Polar Bear's Café. She got the job unexpectedly while accompanying Sloth, who was seeking residence in the café's backyard. Polar Bear, interviewing candidates then, immediately offered her the position after comparing her favorably to other applicants, even though she wasn't actively job-hunting. She is notably tall, standing at Polar Bear's shoulder height. Her typical uniform includes a white button-up blouse with sleeves rolled to three-quarter length, a black vest, black pants, and black heeled shoes. She also wears a long black apron and a red bandanna over her brow-length bangs, styling her brown hair in two braids resting just below shoulder length. Sasako possesses a laid-back and calm demeanor, occasionally displaying airheaded tendencies. This includes failing to notice the romantic feelings harbored by Handa, a panda caretaker from the local zoo who frequents the café. She maintains a professional and friendly rapport with Polar Bear, handling his puns and jokes with ease. She worries about Panda during his impulsive moments and offers advice when asked. Her connection to Sloth began when she helped him relocate to the café's backyard, inadvertently leading to her own employment. She shares a hometown background with Llama. Handa developed an immediate infatuation due to her friendly nature, becoming a regular patron to interact with her; Sasako remains oblivious to his affections, viewing him purely as a friend. She enjoys bicycle rides and is proficient at narrating scary stories despite her personal aversion to them. Her storytelling skill is notably effective, once causing Handa to faint. During the Tanabata festival, she wished for increased customer traffic at the café.