1. Mm! Mm! (Episode 1, Cruelty)

  - In the opening episode of the series, after a tragic attack on her family by demons, Nezuko is transformed into a demon herself. Tanjiro, her brother, tries to reason with her, and despite her inability to speak, she communicates her emotional turmoil and affection through muffled sounds. These sounds, although not words, convey her struggle against her demonic instincts to hurt her brother. This non-verbal communication is crucial because it sets the stage for their bond and her internal fight to retain her humanity.

2. Nii-chan... (Episode 19, Hinokami)

  - During the intense battle between Tanjiro and Rui, one of the Twelve Kizuki, Nezuko's single utterance of Nii-chan (big brother) as she awakens from her unconscious state is pivotal. This quote highlights her deep connection to Tanjiro and her will to protect him. It is a moment of pure emotional resonance, emphasizing the strength of their sibling bond, which is a recurring theme throughout the series.

3. Take care, Tanjiro. (Episode 26, New Mission)

  - Towards the end of the first season, Nezuko's soft-spoken words to her brother as he embarks on a new mission underline her caring nature. Even as a demon, her concern for her brother's safety showcases her enduring humanity and love. This moment is significant as it underscores her character's development from a protected sibling to a concerned and supportive figure.

4. I can’t smile like that anymore. (Episode 7, Muzan Kibutsuji)

  - This reflective quote, which Nezuko expresses through her thoughts rather than spoken words, occurs when she sees a family enjoying a peaceful moment together. It speaks to her internal struggle and the pain of her transformation. This quote is important as it reveals her yearning for the past and the normalcy that was taken from her. It is a poignant reminder of the personal loss she endures and her desire to protect others from experiencing the same fate.

5. Even if I am a demon, I am Nezuko Kamado. (Episode 8, The Smell of Enchanting Blood)

 In a powerful declaration of her identity, Nezuko asserts her individuality despite her demonic form. This quote encapsulates her determination to hold onto her sense of self and her resolve to fight alongside her brother. It’s a testament to her inner strength and the resilience that defines her character. This moment is essential as it highlights her acceptance of her condition while refusing to let it define her.

Nezuko's journey in Demon Slayer is one of transformation, resilience, and unwavering familial love. Despite her limited dialogue, her actions, and the few words she speaks or conveys through her presence are laden with meaning. They illustrate her struggle and triumph over her demonic instincts, her deep love for her brother, and her steadfast commitment to protecting others. These quotes encapsulate the essence of her character and the thematic core of the series: the power of love and determination in the face of overwhelming adversity.

Finally, her poignant comment, things don’t always go the way we want them to, appears in Episode 9, Together Forever, of the anime series Demon Slayer. This statement reflects her profound acceptance of the harsh realities of life. Her transformation into a demon is a testament to this idea, as it shatters her dreams and normalcy. Despite this, Nico adapts and remains resilient. Her words underscore the central theme of the series: the struggle to find strength and hope in the face of unforeseen and often tragic circumstances. It serves as a reminder of the importance of perseverance and adaptability.