To most people, Hange appeared to be an energetic, freethinking researcher with a very unique way of conducting themselves and their work through their rather observant and objective character. Hange explains that when they first joined the Survey Corps, their heart was filled with hatred; untill they kicked the head of a 3 meter Titan and were shocked at how abnormally light it was. This drove Hange to forget most of the resentment and insecurity they held onto, and take on a new approach to Titan research. Hange also showed great compassion for the Titan test subjects, even crying when they were forced to put Bean in severe pain for an experiment, and having a complete meltdown when the Titans were killed

As the threat of the enemy became more severe, Hange less frequently showed their lighthearted nature, often remaining calm and serious. However, they still displayed great empathy toward others, including the dead and suffering. This was last seen when Hange attempted to console Mikasa Ackerman by explaining their agony over the constant loss of their comrades - hugging her in sorrow. Despite being a brave soldier, Hange confided in Moblit Berner that they felt terror in all of the Titan things that were unknown to them, but their curiosity about the Titans and concern toward Hange's dear ones appeared to be greater. As their responsibilities continued to grow with their position as Commander, Hange more frequently showed signs of severe anger, stress, and exhaustion.

Hange is a genius, using their brains to create weapons, tactical plans, and inventions for the benefit of humanity. As a leader, Hange thinks of their peers, and can easily solve complex problems to create plans for their teammates to carry out. With a less cheerful tone, they can use this genius as best they can, being able to easily manipulate people into doing what Hange wants, to benefit humanity.

However, Hange's energetic attitude was only half of their personality, alongside a darker attitude normally kept under their usual self. They showed a psychotic side when giving a demented smile to Djel Sannes, telling him of the horrible pain Hange was going to cause him for what he did to Hange's friend, Minister Nick. Furthermore, Hange even smiled and sarcastically joked with Sannes during his torture at Hange's and Levi Ackerman's hands. Probably the strongest emotion Hange expressed was anger, as they were often seen flipping from calm and collected to rage-filled and threatening. However, this extreme change in personality was usually brief as they quickly calmed down themselves, and was only seen in highly urgent situations; this change of character is often marked by Hange putting their glasses on top of their head, and their cheery nature can be seen returning when they put them back down.