There are two kinds of dragons--good and evil--and Zennyo Ryuo was a good dragon who did not do harm; it is a golden snake of 2.5 cm long who appeared with the respect of the dharma of mantra, Shingon, and stands atop a snake of about 3 meters long.
龍に善悪あるが、善女龍王は害を加えない善龍であり、真言の奥義を敬って出現した8寸（2.5cm）の金色蛇で9尺（3m弱）の蛇の頂上に位置するという。