The 104th Cadet Corps is the only graduating class introduced in the series and the southern division contains nearly all the central characters. It was active during the years 847 through 850 when the remaining recruits graduated.
Commandant Sadies's individual cadet evaluations for 104th Southern Division
Reiner Braun — “Stalwart in both mind and body, and well-respected by his comrades.”
Armin Arlert — “Although lacking in physical strength, his aptitude in the classroom is extraordinary.”
Annie Leonhart — “Her slice attacks are absolutely flawless, but her reclusive tendencies make her a poor fit for coordinated efforts.”
Bertholdt Hoover — “He possesses remarkable potential, but lacks aggressiveness.”
Jean Kirschtein — “Top-class omni-directional mobility. But his volatile personality tends to cause friction with others.”
Conny Springer — “He excels at executing quick turns, but is also a bit dim-witted.”
Sasha Braus — “She has unconventionally good intuition, but also demonstrates poor teamwork as a result.”
Mikasa Ackermann — “Completely proficient in every area. It's apt to say she's an unmatched, unprecedented genius.”
Eren Jaeger — “He has no real specialties, but he's improved his grades with his unparalleled effort. And he possesses twice the sense of purpose than anyone else.”
A notable member who did not make the top 10 of the 104th Southern Division is Ymir. Her abilities easily surpass those of the graduate ranked in 10th position, Christa Lenz, but during the final weeks of training, Ymir began slacking off to ensure Christa's spot in the top ten and allow her access to join the Military Police.
Four of the top five graduates of the 104th Southern Division are known to possess the power of the Titans. The only exception is Mikasa Ackermann, the number one.
It is stated that the main cast belongs to the Southern branch. There are four divisions of the 104th operating within Wall Rose, one for each major district. Prior to the loss of Wall Maria, there were a total of eight divisions operated by the military.
It is notable that Eren Jaeger graduated into the Scout Regiment several days before any of the other cadets chose their divisions due to special circumstances.