Who Would You Pick From An Anime To Be Your Romantic Partner For Life?

From any anime, who would you pick to be your romantic partner for life? And I'm not talking about how they are portrayed in the fandom, I'm talking about how they are exactly from the anime. Personality and all, they don't change and you can't change your mind. 

Who are you picking and why? And your answer can't be, " Because they're hot! " You need to give an actual reason.