Arisa is an aspiring knight studying at First Royal Knights Academy. Training under her instructor, Reika, she meets and befriends two other students, Mikage and Kaguya, bonding with them as they're sent out on monster hunts. Arguably the most cheerful of the three, Arisa lives in the moment, not hiding what she feels. She works to support her five younger siblings, sacrificing part of life to do so. However, she doesn't view it that way.