At this time, Lelouch had only just obtained his power. All he wanted was revenge against the Britannian Empire. He had not officially begun contacting Area 11's Resistance Organization, and he had no thoughts whatsoever about the so-called Knights Order. Much less had he conceived of the later plan to make Nanalie the Empress of the Britannian Empire. That thought probably had not even appeared yet.
Everything was only just beginning to change. Lelouch had yet to figure out what he truly wanted or what he truly wished to change. So when he heard Xiao Ran say that he wanted his sister Nanalie to become the Empire's ruler, Lelouch's mind went blank for a moment. But after that brief daze, countless thoughts suddenly sprang into his head.
All at once, Lelouch felt that Xiao Ran was right. This was what he truly ought to do. Making Nanalie the Queen of the Britannian Empire was what he truly should be doing. If he could achieve that goal, he would certainly face countless hardships and enemies along the way. He could drag that bastard down from the Emperor's throne and fulfill his desire for revenge, while allowing gentle Nanalie to influence and change the entire Britannian Empire. At the same time, Nanalie would never again face any threat.
Among all the Empire's heirs, no one was more suitable than Nanalie. Nanalie was Lelouch's sister, gentle yet strong, and the person most important to him. If he did not make Nanalie Emperor, was he supposed to help someone else? Lelouch did not dare help anyone else, because no one was more reliable than himself becoming Emperor or Nanalie becoming Emperor.
In that short time, Lelouch had actually thought through a great many things. His thoughts suddenly became clear, and he felt immensely fulfilled.