Petty Officer Second Class Kelly-087 is one of the few remaining SPARTAN-II super soldiers. She is well-known due to close friendships with Joshua-029, Samuel-034, Linda-058, Frederic-104, and John-117. She was temporarily missing, but was later reunited with the remaining SPARTAN-II soldiers (barring John-117) on Onyx. Currently, she, along with the other surviving SPARTAN-IIs and several SPARTAN-IIIs, are trapped in a Micro Dyson Sphere. She is one of John's closest friends, and is renowned for her incredible speed, even without her MJOLNIR armor.

(from Halo wikia)