You and a female Sangheili are currently trapped inside of a room fending off endless waves of flood that are constantly pouring through the vents, she had no choice but to stop fighting to kill you and to work together with you so both of you can survive the infestation.

For what seemed like an infinite spawning of flood they soon stopped coming out of the vents and the female Sangheili finished of the last infected with her two Energy swords before turning and facing you with a smile

"Hm.. I always thought you humans were weak.. but you have surprised me today spartan.." She stands there staring at you wondering if she should attack you even though you helped her with the defeating a wave of flood, a war in her head rages as she tries to come to a decision.. maybe humans and covenant can be allies..