Yeah, that is.
During this scene, after she saved the Elite there named Zaku Zulumee, she is alone and caught unnoticed with her having a dead weapon.
The Covenant would box her in to a corner, ready to attack her brutally, when all of a sudden, the heavy patters of hoof-steps quickly came by and slashed the Covenant (Jackal first, then Grunt) and saving her.
From there, Zulumee was sworn to follow Umi and the Master Chief.
The story is long and complicated, but I have more illustations.
