Adelie-san is a supporting character within the Koupen-chan universe. Information about Adelie-san describes an adult penguin, specifically identified as an Adelie penguin, which distinguishes the character from the series' protagonist, Koupen-chan, who is a baby emperor penguin. The character has a voice actor assigned, Junya Majima, indicating a defined presence in animated adaptations.

In terms of personality, Adelie-san is characterized by a tough-talking exterior. The character speaks in a rough or gruff manner, which contrasts with the overwhelmingly gentle and encouraging tone of the main character, Koupen-chan. This blunt demeanor is a key part of the character's identity, providing a source of gentle humor within the stories.

Adelie-san's role in the story is that of a supportive friend to Koupen-chan and other characters. The character's primary function is to be a companion who, despite a gruff attitude, is fundamentally caring. This is most clearly demonstrated through the character's notable abilities and hobbies. Adelie-san is specifically said to enjoy cooking and possesses strong skills in the kitchen. Additionally, the character is also noted to have strong sewing abilities. These domestic skills suggest a practical and nurturing side that balances the rough exterior. Adelie-san is part of the core group of friends that populate the world, alongside characters like Evil Enaga and Polar Bear. No specific information is available regarding Adelie-san's individual motivations, a detailed backstory, or a character arc involving significant development over time.