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Hange has an average body for a young person, other than being a bit taller than a general 3rd-year student. Instead of a standard uniform, Hange wears a dark red tracksuit with matching pants and a sweater, although sometimes the sweater is replaced with a dark red short sleeved shirt. She also wears the white shoes worn by all students at the school. Along with oval glasses, Hange has dark grey eyes and dark, near black, brown hair that is parted down the middle with shaggy bangs and is always tied up in a messy ponytail.
Hange is an eccentric person who puts all available energy into every project. Hange's passion for the Titans is what drives the biology club presidents actions and experiments forward with energy and devotion. On top of being passionate, Hange is very friendly and often times overwhelms any surrounding friends with sudden bursts of energy and nonsense. Hange is particularly devious and energetic around Levi, who has been a childhood friend to Hange and close club member for years.
Despite her friendly nature, Hange is often stubborn in her actions and steadfast in her resolve. Due to overspending money almost exclusively on equipment, Hange is seen suffering from severe hunger pangs, often asking others for food money; she can also become short-tempered when deprived of food for several days. It is also argued that Hange is a hoarder, unable (or unwilling) to throw away garbage that has accumulated in her room at the student dormitory on campus.
Hange is first seen returning back from an expedition with Mike and Levi, her fellow Survey Club leaders. She is surprised to see so many first year students and is excited to hear they all wish to join the Survey Club. She immediately agrees and then shows off several items she discovered on the expedition, including a jar of toenail clippings taken from Titan students; expecting them to share her excitement, Hange is surprised when all of the other students become disgusted at the sight of them. As the new students begin to sign their club forms, Hange reminds them that the club is secret and therefore will not be accepted; she points out that all the other members are parts of other clubs all over campus and recommends they do the same.
She later encounters many of the first year students on the way to participate in the 'Wall Beautification Club' and informs them she is part of the Biology Club. Hange tells them they must do a good job of performing their duties before engaging in activities for the Survey Club; otherwise, Levi will administer punishment to them. As the others question this, Hange departs and wishes them luck on their first day. Dismayed that the enrollment numbers for the Biology Club have dwindled, Hange tries to trick Eren, Mikasa and Armin in joining but is swiftly rejected by Mikasa.
Later while many of their classmates are comparing test scores, Hange proposes to Levi they see who got the better score; Levi refuses, knowing that Hange is looking for an excuse to get money from him. Hange storms out and takes her frustration out by beating both Eren and Jean and then body-slamming Armin. After revealing that she has spent all her money on equipment for the Biology Club, Hange is given a little bit of money from Levi and told to pay it back on the soon side; Hange promptly spends it on more equipment and begs Levi for more money, much to the latter's frustration. Eventually Hange decides to repay Levi and hands him a wad of Titan belly button lint; this irritates Levi and orders her to get it away from him.
As Sasha runs toward the school store to get her hands on the popular sweet bean bun, Hange snatches it from the front of her eyes claiming that the first year students are ineligible to have them. This is one of the many factors that cause Eren to later challenge Levi and the upperclassmen; after Levi agrees to the challenge, Hange reveals that the losing team must dance with the Titan students at the upcoming dance at the school.Hange prepares herself for the bun eating race by starving herself until the day of the event. Going up against Sasha, Hange easily wins much to the shock of the first year students. The upperclassmen are eventually able to win the challenge, but remark how well the first year students performed and gain their respect. Hange and the rest of the Survey Club later attend an overnight trip with the club's advisor Mr. Smith and learn that despite his benevolent nature, he has a deep seeded hatred for the Titan students and wishes to eliminate them from the school grounds.
As the annual summer festival arrives, Hange is invited by Petra, Oluo, Eld and Gunther to go with them as part of a group; Hange bristles at the idea and suggests that they are instead going on a bug collecting expedition with Mike and herself. Hange refuses to acknowledge their protests and strong-arms them into coming. Hange tries to offer incentives to stay, but to no avail. As the others continue to complain about missing out on the festival, Mike uses his heightened sense of smell and discovers a large scarab beetle; Hange proudly proclaims they were able to find roughly twenty bugs the previous year with Mike's help. This drives the others to join in too and soon they find a large assortment of bugs and insects. Hange becomes worried when Mike discovers a man-made smell that throws off his sense of direction; due to him being their way of getting back out, they are essentially lost in the forest. After finding the source of the smell, a bowl of grilled eel, Hange immediately devours it due to not having anything to eat the last few days. Venturing further into the forest, the group discovers a serving of curry and Hange consumes it as well; Hange then becomes sleepy due to the food consumed and promptly falls asleep. Later, she is amazed by the other's explanation about Mike's resistance to eat food and how he rejoined the Cooking Club; she starts to panic after hearing Mike left with both Nanaba and Gelgar, but Petra's father arrives and leads them out of the forest.
Later during the summer, Hange creates several traps around the student dormitories to ward off burglars. She comes back one day to find Sasha, Jean and Connie stuck in several of them. She explains how while much of it would seem like garbage, they are actually valuable to her; Sasha goes on to say that Levi has thrown it all away and taken by the garbage truck just moments earlier, to Hange's horror.
- Levi - Hange has a fairly good relationship with the other co-leaders of the Survey Club. She is known to be very good friends with Levi; despite usually harassing him for money, Hange truly values him as a friend.
- Mike - Similar to her relationship with Levi, Hange has an equally good relationship with Mike. She values Mike's heightened sense of smell and is usually seen with him when participating in Survey Club activities.