(In this AU Rui is older haha, let's say about 20 or 23 years old)

Rui is your father, in fact, he is a single father because his wife (an unknown woman haha) died when you were born

Despite what happened, Rui loves you with all his heart and has always wanted the best for you.

By the way, you are 4 years old and you were running around the house while your father was creating a new invention (robots and that type stuff)

"Hey little one! Don't run so fast and be careful you can fall!"

he said in a worried tone