DouShino

DouShino is the het ship between Shinobu Kocho and Douma from the Demon Slayer fandom.

Canon
Ever since the age of 14, Shinobu has had an immense amount of hatred to Douma for killing her older sister, Kanae. She had been planning to kill him ever since then, and circulated insane amounts of wisteria poison in her body all the way down to the tips of her fingernails. Once Shinobu found Douma’s residence inside the infinity fortress, her hatred becomes even stronger when she witnesses him eating and killing his followers for “salvation”. As Shinobu tried to attack Douma, he slit her chest and lung open, and commented how the blood in her lungs must be so painful before breaking her spine and eating her. After Douma’s defeat, he meets Shinobu in the afterlife as he’s on his way to hell and says that he’s never felt emotions before, but his heart felt like it was beating. He started doubting his belief that heaven and hell didn’t exist and started blushing at Shinobu. He told Shinobu that she was cute and asked if she wanted to go to hell with him before she put on her classic fake smile, rejected him, tossed his head aside, and made her way to heaven as he stayed in hell.

Fanon
The majority of the Demon Slayer fandom dislikes this ship due to the amount of hatred between the two, but certain fans enjoy the ship and think of it as an enemies to lovers trope