Thomas Wagner, a first-year student in Titan Junior High’s class 1-4, sports blond hair with distinct sideburns and light brown eyes, clad in the standard male uniform. Balancing enthusiasm with occasional nervousness, he navigates school life through a mix of routine activities and sudden Titan-driven chaos.

At the entrance ceremony, Titans storm the school to pilfer lunches, snatching Thomas briefly before discarding him unharmed—though his meal is devoured. He later teases Eren’s fixation on chee-burgs and allies with Annie’s dodgeball team, urging her to take their mozuku seaweed portions. During Sports Day, he lunges at rivals alongside Armin, Conny, and Marco to bolster Eren’s team.

Thomas vocally resists Rico’s student council proposal to enforce cleaning during breaks, criticizing its rigidity. At the 104th festival, he performs as a dwarf in *Snow White* and aids Eren’s chee-burg stand before fleeing a Titan raid. When teachers block Eren’s retrieval of chee-burgs, Thomas joins classmates to intervene, later cheering Eren’s victory after witnessing Ilse Langnar’s broadcast.

His interactions oscillate between routine tasks and spirited teamwork, defending peers or tackling challenges, embodying a blend of conformity and defiance amid Titan disruptions and school clashes.