User blog comment:SpookyBoogie27/Light Novel Spoilers/@comment-4823600-20130209152029/@comment-1359322-20130209173743

Actually they might have some sort of soul or conscious for in Volume 9 Sun Wukong did tell Georg to converse with his Dimension Lost.

To prevent further conflict why don't we create some hypothesis

Here is my hypothesis, in Volume 12 afterword Ishibumi mention about developing Issei's power further and mention the Dividing Gear as one of them. Then in Volume 13, he revealed Issei's familiar and gave it the name Ryuuuteimaru so what if Issei placed Albion's power on Ryuuteimaru instead this way he can use the Divine Dividing power without any problem.