Wyldstyle is the love interest of Emmet in The Lego Movie.
Wyldstyle is one of the Master Builders, a group of freedom fighters who live outside the normal Lego worlds building whatever they want. She acts like a typical punk-goth, but there's signs that this is just for show. Vitruvius claims that she changes her name constantly out of a sense of insecurity. Wyldstyle has spent her whole life looking for the "Piece of Resistance", a mysterious piece of red plastic that can neutralize Lord Business' secret weapon. Despite being the love interest, she is incredibly savvy in the ways of combat and construction, more so than any other hero character except for her boyfriend Batman.
After the Master Builders are all captured by Lord Business and the Piece of Resistance was cast into the void, Emmet went after it, seemingly sacrificing himself in the process. Wyldstyle mourned for Emmet and, inspired by his courage, broadcast an inspirational message towards all the citizens of the various Lego worlds in the hope of making all of them just as heroic as Emmet. When Emmet returned from the void, Wyldstyle expressed her feelings for him. Since the characters's lips are just painted onto their heads, any romantic moments can only be physically expressed by holding hands.