Attack on Titan Season 2

Eren Jaeger swore to wipe out every last Titan, but in a battle for his life he wound up becoming the thing he hates most. With his new powers, he fights for humanity's freedom facing the monsters that threaten his home. After a bittersweet victory against the Female Titan, Eren finds no time to rest—a horde of Titans is approaching Wall Rose and the battle for humanity continues!

(Source: Funimation)

Age: 15 Birthdate: February 10 Height: 170 cm (5'7") Weight: 68 kg (150 lbs) Position: 104th Trainees Squad, Scouting Legion Graduation rank: 1st  Mikasa is Eren's adoptive sister and mutual childhood friend of Armin. Mikasa shares an unbreakable bond with Eren following events in their past, and rushes to protect him whenever he is in danger. Mikasa possesses impressive fighting skill and strength even as a child.  As a teen, Mikasa is considered a genius among all the army trainees and is incredibly skilled at combat and agility. She constantly worries for Eren's well-being and lives to protect him.  When Mikasa was younger, her parents were murdered and she was taken hostage to be sold into slavery. Eren managed to find her and killed two of the three kidnappers by catching them off guard, despite only being a child. The third kidnapper discovered the scene and began strangling Eren while holding him in the air. Mikasa, trembling, grabbed Eren's knife from the floor. In that split second, Mikasa came to terms with the cruelty of the world, gaining perfect control of her own body and using that strength to kill the kidnapper in a single strike through the heart—killing him to save Eren.  In the aftermath of this trauma, Mikasa asked Dr. Jeager where she could possibly go from here. She was cold and had no place left to call home. Eren gave Mikasa his red scarf and Dr. Jeager welcomed her into their family. Because of Eren's heroics and this gesture, she feels she owes her life to the Jeagers. She continues to wear Eren's scarf from that day into adulthood, and they are inseparable.

Mikasa Ackerman

 Eren is Shingeki no Kyojin's protagonist. His adoptive sister, Mikasa, notes on numerous occasions that he acts on impulse without thinking things through, and she often pulls/carries/throws him when he starts fighting with others to protect him from himself. Along with Mikasa, he tends to spend his free time with their mutual friend, Armin.  His father is a doctor (whom is well respected by Hannes and potentially many more) whilst his mother is a housewife. When Eren was a child, he saved Mikasa from being sold off when a visit to her home with his father. Three men—killers of her parents—were in her house, and he killed two of them—one by slitting his throat and the other by charging at with a quickly assembled spear. Mikasa herself killed the third man after Eren urged her to fight whilst the man strangled Eren. After this, he gave Mikasa his scarf and Eren's father adopted Mikasa into their family. Later, when the Colossal Titan broke through Wall Maria the debris from this attack scattered and hurtled towards his home. He could only watch on as his mother—trapped under the rubble of their house—was eaten by a titan. This event lit the fire of revenge within Eren that he would kill every giant and not live a life cowering in fear.  Sometime after this—before the time skip that jumped a few years ahead, to when he became a soldier—his father injected him with something. It's unknown what at this time but it turns out, because of the injection, Eren can utilize the ability to transform into a titan himself (which explains how his limbs were able to regenerate) with side effects of a high fever and massive stamina drain.  Eren has a special titan power called the "Co-ordinates", by which he can direct abnormal titans to attack elsewhere. Note: Eren Yeager is the official English translation by Kodansha.

Eren Yeager

Age: 15 Birthday: November 3 Height: 163 cm (5'4") Weight: 55 kg (121 lbs) Position: 104th Trainees Squad, Scouting Legion Graduation Rank: Outside the top 10  Eren's best friend, he is physically weak yet emotionally strong. Even though lacking in actual combat, Armin is a genius on theoretical courses and can make plans even under extreme pressure. Even so, Armin kept on thinking that he is weak. He himself does not notice the things he does for Eren and Mikasa, and believes himself to be completely incompetent and hates himself for having to rely of Eren and Mikasa.  (Source: Wikipedia)  Note: Armin Arlert is the official English translation by Kodansha.  

Armin Arlert

Age: 15 Birthday: January 15 Height: 145 cm (4'8") Weight: 42 kg (93 lbs) Affiliations: 104th Trainees Squad,Scouting Legion Graduation Rank: 10th  Ranked tenth in the trainee class. Is good friends with Ymir.  Her true name was revealed to be Historia Reiss (ãƒ’ã‚¹ãƒˆãƒªã‚¢ãƒ»ãƒ¬ã‚¤ã‚¹), and she appears to be the illegitimate daughter from the royal family. After the uprising, she takes her rightful place as the queen. Note: Krista Lenz is the official English translation by Kodansha.

Krista Lenz

Age: 15 Birthday: April 7 Height: 175 cm (5'8") Weight: 65 kg (140 lbs) Affiliations: Scouting Legion Graduation Rank: 6th  Ranked 6th of the trainee class. Extremely pessimistic about the War with the Titans. He ends up leading the people on the supply mission for gas. From the Trost District. Seems like he's amazed by Mikasa's beauty, and thus hating Eren for always being with her.  (Source: Wikipedia)  Note: Jean Kirstein is the official English translation by Kodansha.

Jean Kirstein

Age: 16 Birthday: December 30 Height: 192 cm (6'3") Weight: 81 kg (179 lbs) Affiliations: Scouting Legion Graduation Rank: 3rd  Original he joined the military with aspirations of joining the Military Police and living in the safety of the inner wall.  After seeing Eren's determination and desire to join the Scouting Legion, he considered himself a coward for wanting to get far away from them. Eventually he graduated in the top ten of his class coming in at third place, and joined the Scouting Legion.  Major spoiler: Later it is revealed that he is the Colossal Titan who broke through Wall Maria and infiltrated the walls as a spy. Note: Bertolt Hoover is the official English translation by Kodansha.

Bertolt Hoover

First appearance: episode 15  He is a member of the Survey Corps and Hanji Zoe's second-in-command within the Survey Corps fourth squad. He also serves as Hanji's assistant.  (Source: Shingeki no Kyojin Wikia)

Moblit Berner

 The Beast Titan is a mysterious Titan capable of speech. It is first seen during the invasion of Wall Rose arc.  Shingeki no Kyojin Wikia

Beast Titan

 Marcel was a comrade and childhood friend of Reiner Braun, Bertolt Hoover, and Annie Leonhart. He was part of the group sent by Marley to attack the Eldians of Paradis in year 845, but his mission was cut short by the sudden appearance of Ymir in her mindless Titan form.
  Shingeki no Kyojin Wikia

Marcel Galliard

First Appearance: Anime: Ep. 1 "To You Two Thousand Years Later."

Attack on Titan Season 2 Characters