Reading it over, seems more an avatar then a summoner. A summoner would be more along the lines of summoning an aspect of a diety/patron (IE: the shadow of Bahamut, the sword of Odin, or the actual Leviathan) where as an avatar would summon the power of said diety (such as the zodiac braves from FFT, where each user of the stones gained powers of the previous brave... and the often unsavory visage.) So her power is directly tied to her patron, calling upon her powers to imbue her own rather then a apparition.