Energon Arcee in Japan is called Ariel. So...
Energon Arcee x UT Optimus
While the two of them say its solely a political marriage, everyone can clearly see Arcee and Optimus are deeply in love. It's not clear when Optimus began to see Arcee as more than a friend. It's also not clear when, exactly, they went from hanging out to dating, or when centuries had passed and suddenly it seemed as if they had been made for the other. Seeing the others dreams and being able to walk through them.









