Roar

Howl is the fourth chapter in the second volume and the eighth chapter overall.

Summary
The fight over and the rogue titan victorious, he stands over the corpse and howls. Although confused, Mikasa thinks of the scene as uplifting, considering it the physical manifestation of humanities anger toward the titans. As she's focused on the scene, Armin rushes to her side and brings her to a nearby roof.

On top of the roof, Conny panics at the sight of the titan. However, seeing the rogue titan knocking another's head off causes them all to take pause. Observing that it went direct for a weak spot, Armin notices that it doesn't seem to react to humans like the others do and it seems to hand-to-hand combat. With Mikasa completely out of gas, Armin offers up all of his gas and dulled blades minus one so as to not be eaten alive if caught. Mikasa, thinking of how she had given up, takes the blade from him and refuses to abandon him. Armin's protests mean little, when Conny takes Mikasa's side. Worrying that more of his friends will die, Armin comes up with a plan and leaves it up to Conny and Mikasa to decide.

Meanwhile, Jean and a group of trainees try to make it to the HQ. On the ground, a trainee screams when he runs out of gas and sees titans moving towards him. Another attempts to save him, only to be caught and put in the same situation. Jean and the others take the opportunity to dash toward the headquarters with the remaining supplies. Briefly caught by the leg, Jean cuts off the titan's fingers and continues ahead.