Nanagi is easy to explain. She learned the ways of a Thaumaturge and because of the abundance of Aether in her, was fairly strong. When certain plot circumstances came along, she had to undergo the teachings of Black Magic. She isn't a master, nor is she a novice. She'll only use Black Magic when it is necessary (can't use her own preserves, casting a stronger spell, etc). For simplicity reasons, I say she is primarily a Thaumaturge.
Kanako on the other hand is a bit more tricky. She could be classified as just a civilian OR a fighter (class). She is primarily a merchant and use her honeyed words to get out of situations that could lead to fights. However, if a circumstance were to arise where she would ave to fight, she'll do it and have the mindset of being the one who comes out on top. Back in her caravan, she learned from a hunter how to use a lance. With a lot of practice, teachings from her hunter teacher, and close friend, she became fairly adept with fighting with a lance. She is mostly self taught and will sometimes use techniques you wouldn't usually see. She is a lancer.
Kanako on the other hand is a bit more tricky. She could be classified as just a civilian OR a fighter (class). She is primarily a merchant and use her honeyed words to get out of situations that could lead to fights. However, if a circumstance were to arise where she would ave to fight, she'll do it and have the mindset of being the one who comes out on top. Back in her caravan, she learned from a hunter how to use a lance. With a lot of practice, teachings from her hunter teacher, and close friend, she became fairly adept with fighting with a lance. She is mostly self taught and will sometimes use techniques you wouldn't usually see. She is a lancer.