Someone

Somebody is the 48th chapter of Shingeki no Kyojin manga written and illustrated by Hajime Isayama.

Summary
The pursuit of Eren's kidnappers continues. Erwin, upon seeing Titans reaching them, orders everyone to let the Titans follow them. A soldier of Military Police accuses him of using them as a decoy again, however, Erwin states that it's not his intention and tells them to fulfill their duty as saving Eren is extremely important. Meanwhile, others also keep chasing Eren and others. Armin makes a hypothesis, saying that if Reiner were to remove the armor from his joint areas, he'd run faster. With determined expression, Mikasa states that this time, she will kill Reiner and Bertolt without hesitation, along with Ymir if she gets in the way.

At that time, Krista is released from Ymir's mouth. Ymir apologizes, but Krista questions her intentions, saying that they had come to save her and Eren. Ymir opposes this and states that she's coming with Reiner and Bertolt, telling Krista to come as well as there's no future inside the walls. Krista mentions Titans, but Ymir states that they aren't so bad, much to Krista's surprise. She states that she doesn't understand Ymir's actions at all and wonders if she's being threatened by Reiner and Bertolt. The latter says that it's the opposite. Krista begs Ymir to release her, saying that they can fight together. Bertolt notices that the soldiers are catching up and blames Ymir for delaying them by kidnapping Krista. He questions Ymir, asking if she's going to leave Krista inside the walls again for her own sake, but Ymir reveals the truth, saying that she took Krista in order to save herself. She explains that her Titan powers were stolen from comrades of Reiner and Bertolt and states that with their immense power, she may get killed, but with Krista cooperating, that may not happen. Ymir further reveals her feelings, stating that she's afraid of dying and begs Krista to help her. Krista tells her that no matter what, she's on her side.

At that moment, Eren awakens just as the soldiers catch up. Hannes attacks, but gets countered by Ymir. Without hesitation, Mikasa strikes Ymir, while Bertolt, in fear, begs Reiner to protect them. Seeing the Armored Titan's hardened defense, Mikasa decides to strike Ymir down first, but Krista attempts to defend her. Mikasa, however, states that she will kill Ymir only if she gets in her way.

Jean, Connie and Armin catch up as well just as Bertolt tries to subdue Eren. Jean states that knowing Eren, it's impossible, while Connie questions if everything was lie. Jean continues to attempt to get through to the traitors, bringing up their shared past. However, Mikasa states that there's no need to know their reasons, advising the others to focus on killing the traitors and calling them a plague on mankind. Hearing this, Bertolt finally breaks down and begins to shout, demanding to know who would want to kill others. He admits that their crimes cannot be forgiven, but claims to have been happy during his time with the 104th and that not everything was a lie. He begins to cry and mysteriously begs for someone to "please find us", causing even Mikasa to hesitate. She requests Eren's return, but Bertolt refuses and attempts to justify his actions by stating that someone had to do it. Mikasa's expression darkens, but before she can respond they are interrupted by Hannes warning them to get away. From the direction where Reiner and others were heading, Erwin is running while being chased by a huge group of Titans.