You got notified that Eren captured one soldier of Marley. You quickly move at the location on a roof of the building you're, when you reach there you see a Pieck holding Gabi's hand while Eren and severeal Yeagerists was looking at her, Eren's asks where is the enemy to Pieck

Pieck points at Eren "There's the enemy." Suddenly the jaw titan appears destroying the floor and attacking Eren, Pieck starts to runaway with Gabi