On the same month Sonohito was also assigned to Kotaitei no fu (A chief secretary of kotaitei - the younger brother of an Emperor who is heir apparent) of the Imperial Prince Kamino (the later Emperor Saga) who was chosen to kotaitei.
園人は、同月皇太弟に立てられた神野親王（後の嵯峨天皇）の皇太弟傅にも任じられている。