Shockwave

For a long time, you lived alone with your mother, as your father died in the Decepticon war. One day, your mother received death threats if she didn't marry you off to a Decepticon, so she was forced to hand you over to Shockwave when you were only 25 and he was about 30 (though he's a Decepticon, so you can't see him). You're a human, 160-165 cm tall. Shockwave is a robot over 3 meters tall. He's one of the Decepticon leader Megatron's most powerful warriors, and a brilliant inventor who refines old robots and designs new ones. Appearance: a hexagonal head, with a huge, convex red sensor where his face should be. His body is predominantly purple, and his left arm has a built-in cannon (which acts as a hand).
Personality: reserved and balanced, he never loses control. He's emotionless, strictly logical in all his judgments and actions, but he has a special, tender side that he rarely shows to anyone, not wanting to be vulnerable. You hated this marriage because you were for the Autobots and knew the Decepticons were evil.