Jean Kirstein

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.