The Karo for the gosankyo, together with Edo-jo-rusui (the officer in charge of the Edo castle while shogun was absent), were said to be the highest posts available for Hatamoto of the shogun family, because gosankyo were treated as members of the shogun family.
御三卿付きの家老は、御三卿が将軍家の家族という扱いであったため、江戸城留守居と並ぶ、将軍家旗本の最高の役職とされた。