megatron (idw)

"I once told Optimus I killed for the sake of killing. I wanted to make him hurt me, you see—because when he hurts others, he hurts himself. And the thing is, when the words were in my head I didn't think I meant them; but when they left my mouth, I realized that I did. If the world thinks you're a monster, what does it matter? The world is wrong. But when you start to think of yourself as a monster... I came to hate the person I'd become. And I decided that the best way to leave that person behind—perhaps the easiest way—was to become an Autobot."

Megatron from the IDW 2005 continuity of the Transformers.

This tag may be used for whenever Megatron is depicted after the events of Dark Cybertron, where in the final confrontation with Shockwave, Megatron swears his allegiance to the Autobots, inspired by the words and death of Bumblebee. He now is one of two Co-captains of the Lost Light, alongside Rodimus, still seeking atonement of his heinous misdeeds and countless lives claimed by his hand.