Emperor Penguin leads the Penguins Performance Project idol unit. Her medium-length black hair features distinctive orange streaks in the middle, visually referencing the beak coloration of real emperor penguins. She wears a standard black jacket with orange shoulders, left open over a white leotard. Like other unit members, her sleeve gloves resemble wings. Unique elements include long white socks paired with black boots, and she consistently wears black-and-orange headphones matching her hair color scheme.

Her personality presents a contrast between onstage and offstage personas. As unit leader, she maintains a cool, mature demeanor during performances, projecting confidence. Privately, she experiences significant nervousness and self-doubt regarding leadership responsibilities, sometimes manifesting physically through visible distress or fainting under pressure. Despite her reserved nature, she remains dedicated to her unit and perseveres through challenges.

Recruited by Princess to reform the unit's third generation, she received the leadership position due to the historical significance of emperor penguins in the first generation. She initially doubted her capabilities, particularly after admiring the original Emperor Penguin's dancing prowess. Concerned about her comparatively stiff movements, she suggested Princess assume leadership instead. Princess declined, expressing confidence in her potential. Through persistent practice under Princess's guidance, she developed sufficient skills and confidence to lead the unit successfully.

Her development culminates in a major waterfront concert debut alongside her unit. Despite pre-performance nervousness, reassurance from Margay helps steady her, contributing to the concert's success. Following this, she participates in discussions about Sandstar phenomena with other characters, demonstrating her integration into broader park activities. Later, during a café visit, her reserved yet mature personality remains consistent. She observes food aesthetics with commentary on its black-and-white presentation before enthusiastically joining unit members in requesting servings after another member mixes it.