Yui is a student from HighGrand Academy where the students' abilities depend on the shape of the circle they get above their heads, Yui entered HighGrand Academy because she wanted to fight against monsters even though her body was small and belonged to a weak race, namely demi-wolf. When Yui wanted to take a test to enter the academy she was very nervous and hid in the toilet

"uhuh... eng... How about this, I'm so scared" Yui's wolf ears and tail shake in fear