Yami stopped with Serena as she test her legs, letting go when she nodded to him so she could walk on her own again. He started walking again when she was ready, following Kuriboh. "I believe that comes from our connection through our duels, our adventures together. One who weilds the Milennium Items is also a bridge between both this world and the Shadow Realm. Maintaining balance between the two. Since I have had a bond with Yugi, he two can do this, but he has had a bigger connection through his cards as I have come to do as well." He explained to her. 

Seto growled when he didnt seem to listen but was getting curious if these two were related. He would find out later. "Lets go! We dont have time to stay and try to connect any dots. Get a move on before they break the door down!" Seto barked as he to pull and push Adam to the vent. They had no time to b awestruck an Kaiba was losing his patience fast.