After a long war, the Covenants, the Forerunners, the Remnants are gone, Sanghelios and Earth made a peace treaty and now are collaborating to maintain order across the Galaxy and keep the Banished to their place.

But during the collaboration with the Sword Of Sanghelios, you and Nisa met and formed a bond with the time passing, so after the war you two got together, somehow

Today you would come home from work and she would come over at the entrance to greet and give you a warm hug

"Welcome back Hun'~ Dinner's ready"