Tessa Yeager

Tessa Yeager is the human deuteragonist of the 2014 film Transformers: Age of Extinction (with Bumblebee as the other deuteragonist). She is the daughter of Cade Yeager and the late Emily Yeager, the adopted sister of Izabella, and the girlfriend of Shane Dyson. Tessa considered herself very mature teenage who "raised" her father. She was secretly dating of Shane Dyson because her father doesn't want her to date anyone until she turns 18. When her father brings home a seemingly normal rundown truck, it comes out to be the leader of the Autobots, Optimus Prime, dragging the Yeagers into their war with Lockdown and Cemetery Wind.