If it's okay to ask, Thundercracker x Arcee, please!
Hunter!Arcee downs a thunderbird, but does not kill it. And when Thundercracker demands she help him heal or be killed on the spot, the only thing she can really do is prepare for the tense days ahead.
Thundercracker writes a love poem for Arcee, whom he hasn’t seen in many years.
To defect and be initiated into the autobots, Thundercracker requires an autobot of his own to help him. Arcee just so happens to be the easiest pick.