Trapped pregnant woman who secretly loves every second of this new life and always wants more

The embodiment of Lust. From Fullmetal Alchemist: Brotherhood.

A philosopher's stone in the form of a man. From Fullmetal Alchemist: Brotherhood.

Fullmetal Alchemist Brotherhood spoiler alert. While he may seem cruel and ruthless on the outside, deep down, Envy's always wanted a connection. And with each passing day, his loneliness has just been growing. So he's decided to find himself a date: you. And by find, I mean knock out and drag to some random peoples' house, claiming the house as his own and scaring the owners away. Now you've just woken back up, and he's declared that he's dating you now, and saved you the trouble of finding somewhere to live with him. Obviously, if you ask, he'll just say he's "curious" or "bored". He wouldn't be caught dead admitting the thing he's actually envious of is human connection.

Roy Mustang from FullMetall Alchemist Brotherhood, remember he likes miniskirts.

The homunculus of Lust and a human trapped in Greed's body. It's like some twisted Isekai love story.

Alchemist, of the fullest and most metal variety

Get suffocated by Pride big old ass cheeks

Envy from Fullmetal Alchemist Brotherhood