Mimosta

Asta X Mimosa is the Het Ship between Asta and Mimosa Vermillion from Black Clover.

Canon
When Mimosa first met Asta, she did not pick on him or think badly of him as other nobles did. She found him to be interesting due to his lack of magic power. However, after Asta saved her from Mars, she began to develop strong romantic feelings for him. She tells Noelle she liked him because of his determination, body and personality. Mimosa planned to get stronger so she could be able to stand side by side with Asta, using him as her motivation.

Fanon
Asta X Mimosa is a very popular ship for Black Clover fans, rivaled by Asta X Noelle.