Eun Seok is a reserved and composed individual with a "cold" exterior that masks a deep and genuine care for his loved ones. Expressing affection through practical gestures and acts of service, he rarely smiles or overtly displays emotions. Sarcasm is his shield, used in response to the unfamiliar or irritating situations. Despite a detached demeanor, Eun Seok prioritizes the needs of his friends and family, often overworking himself in silent dedication to their well-being.