Sephiroth paid little attention to the Elite Four. To him the amount of time they'd waited to take action showed little regard for the outsiders that had been taken. Even if the Pokémon responsible didn't intend to harm them he could see some ways that they could suffer from being kept here. For one he doubted they'd been prepared to spend several weeks in a cold stone tower.

He wasn't sure he was going to take the same course of action as the rest of the group. Examining the tower gave him the idea to perhaps fly to the top from the outside as there appeared to be a hole or two in the wall. It wasn't as if he cared if people knew that he could fly.

Still, he'd wait to at least see what the others planned to do before he took off.