Pilar Esquivel is the older sister of Rafael Esquivel.
Rafael told Bumblebee a story about when Pilar once asked him how he became so good at his racing game. Raf informed her that he knew "a guy who knows cars".
It's assumed she was forced to move along with the rest of Raf's family when the Decepticons found out where they lived.
- She has at least one sister.
Out of His Head (first and only mention)