RivaMika

RivaMika is the het ship between Levi Ackerman (often romanized as Rivaille) and Mikasa Ackerman from the Attack on Titan fandom.

Canon
Levi and Mikasa are the two strongest soldiers of the Survey Corps, often referred as Humanity's Strongest Pair. Mikasa eventually become a member of Levi's Special Operations Squad, handpicked by Levi himself.

Fandom
AO3