In volume 11 of "Aria", after Alice graduates from middle school, she is promoted to Prima straight from Pair, the first undine to do so, and is given the title.
She is promoted to Prima straight from Pair. This was in volume 11 of "Aria". This was to do so. She is given the title. This was in volume 11 of "Aria". Alice graduates from middle school. Pair is the first undine.