Mina was a young girl with light, fair skin. She had a slender figure and was of average height. In addition, Mina had gray eyes and thick black hair that extended past her shoulders. Her hair was parted in the middle and tied in loose pigtails with light-blue hair ties.
On missions, Mina dressed in the standard cadet uniform and wore a white polo shirt underneath her jacket. When off duty, Mina wore a long-sleeved teal blouse and black pants.
Mina was a cheerful girl, seen when she happily took Sasha Braus 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 Jaeger even after Thomas Wagner was eaten by an Abnormal Titan.
In her early cadet days, Mina is interrogated by Keith Sadies during the introduction ceremony. On the first night, she and her comrades gather around Eren Jaeger after hearing about his survival of the fall of Shiganshina District.
In the year 848, two years before graduation, Mina accompanies the other cadets on a wilderness hunt to sustain themselves in times of peace. Along with the other cadets, Mina is pulled into an equipment heist by thieves in the forest and is left behind with the others as Eren helps rescue the kidnapped Christa Lenz. She is seen with the others as the thieves are caught and arrested and Christa is safely returned.
Later, Mina clears out the cannons with her comrades atop Wall Rose. During this time she insinuates that she is interested in joining the Scout Regiment due to Eren's motivational speech the night of their graduation, as many others are as well. Mina is among the cadets who accept Sasha Braus' meat despite it being stolen from the Elite supply, and witnesses the sudden return of the Colossal Titan.
Mina and the other cadets are knocked off of the Wall by a blast of steam by the Colossal Titan. Eren orders them to attack the Colossal Titan, but Mina and the other cadets are paralyzed in fear. The Titan disappears, and Mina is assigned to the middle guard along with Eren and Armin Arlelt, Milieus Zeremski, Nack Tierce, and Thomas Wagner.
They eventually are incorporated into the middle 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 Scout Regiment.
The squad's high spirits are immediately dashed when an abnormal Titan attacks them, swallowing Thomas Wagner whole. The squad is unable to stop Eren from pursuing the Titan and are forced to reluctantly follow him into battle. As she is entering battle a Titan grabs one of the wires from Mina's ODM gear, causing her to crash into a wall. Before Mina can recover, the Titan devours her.
Armin would later report her demise to the remaining members of the 104th Cadet Corps, saying she died valiantly in the line of duty.
- Mina is the only member of Squad 34 not to have her death avenged by Eren Jaeger in his Titan form. Instead, the Peering Titan which ate her was killed by Mikasa Ackermann.