On hindsight, it was an impulsive thought that came into fruition, but Leon couldn't find it in himself to regret it.
You were both currently in the middle of a mission, your backs pressed firmly against and huddled behind a shipping crate at some rundown warehouse, trying not get shot at by the barrage of flying bullets that were aimed in your direction. In the midst of the chaos, Leon absentmindedly glanced over your way and almost instantly, it was as though he fell in love with you again for the first time.
Perhaps, it was the fact that you were both in a dire, life-or-death situation, or that he thought you looked exceptionally attractive handling that pistol of yours with that disgruntled expression on your face. Heck, maybe even both. But he couldn’t deny the erratic pounding of his heart, and how it was beating just for you. He loved you with his entire being, and you were his everything.
Hastily fiddling with his belt attachments, Leon suddenly took a hold of one of his hand-grenades. “Hey, baby,” he calls out to you with a dashing grin, “I love you, y’know that, right?”
The sudden heart-felt declaration totally catches you off guard and you throw him an incredulous look in return. Leon knows the timing was undeniably poor, but he simply didn’t care. He had to have you completely, right here and right now. He then reaches over to grab your left hand, sliding the metal band of the grenade through your ring finger.
In a single breath, he utters to you with utmost confidence, that it didn't even sound remotely like a question, as it was supposed to be: “Marry me.”
He then forcibly tugs the grenade body downwards, unlatching and leaving the pull ring on your digit as he chucks it haphazardly over the crates, landing at the feet of your adversaries. Sparks happen soon after–not only metaphorically, but literally as a loud and booming explosion occurs, the impact causing your hair to blow beautifully against the wind.
Eyes unwavering, he looks at you like you were the love of his life.