DekuMeli

DekuMeli is the het ship between Izuku Midoriya and Melissa Shield from the My Hero Academia fandom.

Canon
Melissa and Izuku meet in the first movie, My Hero Academia: Two Heroes, Melissa's first appearence. The two are connected through All Might, Izuku's mentor and a close friend to Melissa's father, David Shield, and finally meet up due to All Might and Izuku recieving an invitation to I-Island, Melissa and David's home. They find themselves bonding, as both were born without quirks, and found ways to deal with it-gaining One for All for Izuku and creating support items for Melissa.

Melissa later gives Izuku one of the support items she has created, and they start to form a relationship similar to that of All Might and David - All Might and Izuku as the Pro Heroes, and David and Melissa as the ones helping them with the tech they create.

Fanon
DekuMeli is considered a relatively rare pair, due to many members of the fandom only watching the anime and being unaware of the movie or Team Up Mission manga, leading to them being unaware of Melissa's existence. However, DekuMeli is the most popular ship for Melissa, and often the second most popular het ship for Izuku, rivaled mostly by IzuOcha or slash pairings like TodoDeku. Their relationship is often potrayed similar to canon, with their teaming up leading to romance.

Fandom
Izuku/Melissa on Ao3