Matsuda Takato truly knew ôMakino Rukiö better than anybody else, and all that knowledge was available to Lucemon Magus Mode. From the most esoteric things such as her quirks, likes and dislikes, her tastes in food and clothes and her conditioned reactions to all sorts of unexpected situations, to the most fundamental things like the frequency of her menstrual cycles, her visual acuity, the thickness of her hymen and the distribution of fats throughout of her body.
Matsuda Takato knows Makino Ruki even to the molecular level: not even the chain of billions of DNA base pairs that make her genome is a mystery to him.