Mina was a young girl with a slender figure. She was considerably shorter than her comrades, even shorter than Historia. Mina had thick black hair that extended past her shoulders. Her hair was parted in the middle and tied in loose pigtails. On missions, Mina dressed in the standard trainee uniform. When off duty, Mina wore a long-sleeved blouse and dark pants.
Mina was a cheerful girl, seen when she happily took Sasha Blouse up on her offer of meat that would be restored when they retook their land, but she was also rather brave when she went after Eren Yeager even after Thomas Wagner was eaten by an abnormal Titan.
On the first night of her days in the 104th Training Corps, Mina joins a handful of other trainees in watching Sasha Blouse run laps around the training grounds as punishment for eating during their opening ceremony. As they go to eat dinner, the trainees discover that Eren Yeager is a survivor from Shiganshina District and begin to bombard him with question about its downfall.
After graduation, Mina is seen cleaning the cannons with her comrades atop Wall Rose. She insinuates that she is interested in joining the Survey Corps due to Eren's motivational speech the night of their graduation, as many others are as well. She accepts Sasha's meat despite it being stolen from the senior officers' private stock, and witnesses the sudden return of the Colossus Titan.
When the Colossus Titan appears outside Trost District, Mina and her fellow trainees are knocked off the wall by a blast of steam. Eren orders them to attack the Colossus Titan, but she is frozen in fear.
The Titan disappears and Mina is assigned to the middle guard with Eren, Armin Arlert, Mylius Zeramuski, Nac Tias, and Thomas Wagner. They are positioned as part of the front guard due to the number of Titans. Eren begins talking about how killing Titans that got in Trost will improve their rank, and she joins him, indicating that she is also signing up for the Survey Corps.
The squad's high spirits are immediately dashed when an abnormal Titan attacks them, swallowing Thomas whole. Eren immediately tries to attack the Titan but is left critically injured by a second Titan, leaving the squad in shock. Mina is spurred to action when a Titan begins heading towards the squad, but as she is attempting to engage it one of her wires is grabbed by another Titan. She is flung into a wall and is unable to recover before being devoured.
- Mina tied with Keith Shadis for forty-first in the Second Character Popularity Poll.
- Mina is the only member of Squad 34 not to have her death avenged by Eren Yeager in his Titan form.