|You never change. For a man your size, you're as delicate as a fawn.|
|— Dot Pixis to Kitz Weilman|
Kitz Weilman is a visually tense man, with sunken eyes, and an expression of perpetual worry. He has a thick brown mustache that covers his upper lip. He wears his brown hair slicked back, with it framing his face and forming a thick beard.
In stressful situations, his paranoia tends to overwhelm his sense of judgment, leading him to act rashly without considering all aspects before him. This has not gone unnoticed by his superiors, as Dot Pixis pointed out that despite his imposing physique, Weilman was perpetually weak-minded and foolish.
Some time after Eren Yeager emerges from his Titan form; Weilman has him, Mikasa Ackerman, and Armin Arlert surrounded by troops and demands that Eren explain the nature of his transformation or all three of them will be executed on the spot. He is incredibly concerned and makes it known that since Titans are the main enemy of humanity, Eren is no different. While Rico Brzenska agrees that Eren is a threat, Ian Dietrich cautions that losing Mikasa would be a serious blow to humanity's strength. When Eren's answer fails to satisfy him, Weilman orders a cannon fired at them, forcing Eren to transform once again in order to protect his friends.
Eren's transformation only fuels both Weilman's and the soldiers' fears. Despite Armin's impassioned plea and argument that Eren's Titan form could be used to turn the tide against the enemy, Weilman refuses to see Eren as anything more than an enemy and attempts to have them executed again. During the entire confrontation, he is riddled with fear. Before he can fully give the order, Dot Pixis appears and orders him to stand down.
Shortly after, Captain Weilman appears among other Garrison soldiers, wondering what Pixis's motives were for saving Eren. He is among the officers questioning those who are trying to desert the Garrison and again threatens execution.
After receiving news that Wall Rose was supposedly breached, he is left to command the eastern line of defense. He and his men lure the Titans into cannon fire, while Rico Brzenska cuts their neck, killing them.
Kitz Weilman's statistics as of year 850:
- In an issue of Bessatsu magazine, Isayama revealed that Weilman has a wife and children.
- Weilman shares a birthday with Onyankopon.