Talk to Amanda
Speak to Amanda Holliday in the Tower Hangar.
"The first time I met Zavala, I was really intimidated. He's kind of a lot to take in, you know? But then we got to talking about the City and the Walls and how we're all going to die and the nine hundred things that want to wipe us out. And I realized he's actually much scarier than most people give him credit for."