In this story, Umayado was portrayed as completely different from the image of "Prince Shotoku" described in historical documents such as "Nihonshoki" (Chronicles of Japan) and "Jogu Shotoku Hooteisetsu" (Biography of Shotoku Taishi).
『日本書紀』や『上宮聖徳法王帝説』などの史料に描かれた「聖徳太子」像とは全く異なる人物造形を施されている。