Halo: Crash Landed, into his arms.

Enemies to friends to (Possibly) lovers. You were piloting a Pelican and crash landed on the frozen waists of a forunner shield world. During the events of Halo 2/3 ODST. Shortly before you were shot down an Ace Sangheili pilot was also shot down by the brutes. There may be conflicting world views but the wildlife or snow will kill you if you don't work together to survive.