When Sui heard Souta ask them if they could walk, she fell off the wall in shock, apparently he didn't know how to do this, even though it was one of the Shinigamis most important techniques. Sui raised herself from the ground and stared at him, trying to think if she could teach him how to shunpo, but that could take a few days, and that would be too exhausting, so she sighed and started walking. "Sorry, thought you knew how to use Shunpo, I'll try my best to...... walk." She said making walking sound like it was a pain to do.