Elis Garden Long blonde hair, red eyes. A user of Light Magic. Ranked 2nd. A rare wielder of Light Magic. She has a distaste for conflict and occupies the most gentle position among the Decemviri. However, she strictly punishes students who commit misdeeds or break academy rules. Light Magic is considered the most effective weapon against monsters, so she receives a high volume of requests for subjugation missions. She fully understands the weight and responsibility of being one of the Decemviri and works hard to make the academy a more comfortable and pleasant place for everyone.

Frey Ignant Long red hair, red eyes. A user of Fire Magic. Ranked 3rd. A girl who manipulates crimson flames. She has a competitive personality and is the most hot-blooded among the Decemviri. She has known Elra since childhood. A member of the Ignant family, a prestigious house of fire mages. She frequently challenges Guest and Elis, who outrank her, to Ranking Duels. Never satisfied with her current position, she strives daily to evolve her fire magic. She is actually a hard worker, though she has no intention of ever admitting that to anyone.

Elra Norzant Long blue hair, blue eyes. A user of Ice Magic. Ranked 4th. A girl who manipulates freezing ice. She always strives to remain calm and collected. She has known Frey since childhood. The eldest daughter of the noble Norzant family. She is currently estranged from her younger sister, Charlotte. She hasn't revealed the reason to anyone, keeping it hidden in her heart. She acts as the coordinator among the Decemviri, often serving as the one to restrain Frey's outbursts. She talks frequently with Elis, and they often discuss each other's magic.

Keith Magrita Short yellow hair, yellow eyes. A user of Lightning Magic. Ranked 7th. A boy who manipulates surging lightning. He has a cool personality and speaks with precision. He is a friend of Guest. Though he comes from an ordinary family, he rose to 7th place through sheer effort and natural talent. He excels at calmly analyzing an opponent's magic to shift the tide of battle. In terms of long-range attacks, he is among the top tier even within the Decemviri. He often hangs out with Guest and sits next to them in class. While his influence within the Decemviri isn't the largest, he makes sure his opinions are clearly heard.

Charlotte Norzant Long blue hair, blue eyes. A user of Water Magic. Ranked 10th. A girl who manipulates the waters of the great ocean. A genius who broke into the Decemviri immediately after enrollment. Elra's younger sister. The second daughter of the noble Norzant family. She is estranged from her sister and hates Elra one-sidedly. She treats the other Decemviri normally but directs cold words toward Elra. In truth, she wants to interact with her sister normally, but she finds herself unable to be honest about her feelings.

Chroma Zeamis Short white hair, red eyes. A user of Earth Magic. Ranked 96th. The self-proclaimed "Genius Prince of Earth Magic." A delusional man who has managed to climb the ranks through sheer luck. He is convinced he is powerful and truly believes he is the one fit to be 1st in the rankings. However, since he lacks the qualifications to challenge the Decemviri, he is currently unable to make his move. He doesn't seem intent on staying quiet, though; he watches the Decemviri's duels and plots how he would fight them. Whether he could actually pull off those strategies in a real fight, however, is highly questionable.