MuiNezu

"Have I met her before? Must've been some time ago. Why..."

- Muichiro to Tanjiro about Nezuko

MuiNezu is the het ship between Nezuko Kamado and Muichiro Tokito from the Demon Slayer fandom.

Canon
Muichiro and Nezuko first unofficially met at the Pillar Meeting, wherein Muichiro claimed that he did not mind if Nezuko was kept alive in spite of his fellow Pillars' disagreements since he would forget about the situation later on.

Later, Muichiro senses Nezuko's demon blod, when she is sleeping in her box; he wants to reach out his hand, but Tanjiro strikes him. When Muichiro and Nezuko encounter each other face to face at the Swordsmith Village, Muichiro seems to remember Nezuko's face and wonders aloud where he had met her before despite not being as attentive as his fellow Pillars when he first encountered her. He thinks Nezuko is strange, but admits it's hard to put his initial impression into words. He tilts his head and crosses his arms at Nezuko, and she imitates him in return.

When the components of Nezuko's blood change and she gains immunity to the sunlight, Muichiro seems to be happy, and after Nezuko hugs her brother, he draws attention to that and asks what happened to her.

During the Sunrise Countdown Arc, Nezuko begins to recall all of her allies and friends when becoming human once more. She recalls Muichiro fondly, with an image of him smiling at her and holding his crow up coming to her mind, insinuating that he was very kind to her during their time together and that they got along well. After remembering him, Nezuko manages to stand up to her feet.

In one of the last chapters, Nezuko and Tanjiro are saying goodbye to their deceased friends, and Muichiro is seen alongside the other Hashira's and the other ones who couldn't survive.

Fanon
Muichiro and Nezuko have not interacted much within the canon storyline of Demon Slayer, making the ship more of a rarepair. However, fans seem to be taken with a lot of aspects of their relationship, such as Muichiro's relative indifference towards everyone else except for the Kamados as well as their similar ages. Muichiro seems to treat her well compared to many others (save for Tanjiro) in the little that has been seen of the two of them together.

Many fans like to speculate that Muichiro would be overly caring towards Nezuko while pushing everyone else away, or overly affectionate to the point of annoying his friends, such as this text post by daily muinezu on Twitter. Most of the content for them online is edits of them together (with Nezuko typically replacing Tanjiro, such as this Twitter post), however there is a small fanbase for artwork of them on Pixiv as well.

Fandom
FAN FICTION

ART
 * Muichiro/Nezuko tag on Pixiv

TWITTER
 * MuiNezu posts on Twitter
 * むいねず posts on Twitter

Trivia

 * Muichiro and Nezuko are both 14 years old.
 * Both have ranked 3rd Place in a character popularity poll before, with Nezuko ranking 3rd in the First Popularity Poll and Muichiro ranking 3rd in the Second Popularity Poll.
 * Nezuko frequently dreams of people that have been nice to her, specifically those she considers incredibly close to her. Muichiro is likely one of these people, as he was seen in her memories of the past during her transformation from demon to human.