The image of Hachi no Miya that 'an imperial prince who was driven to retreat into seclusion after getting dragged into political strife and is diligent in his Buddhist training' resembles that of Imperial Prince Koretaka who appears in "Ise Monogatari" (The Tales of Ise).
「政争に巻き込まれたために隠遁を余儀なくされ、仏道に励む皇子」という八の宮の人物像は、『伊勢物語』などにも登場する惟喬親王と類似する。