Draco's achievement shocked Richmond, Zaine, Hikari and Riveting Night. Even though this was Zaine and Hikari's first time witnessing Draco try to move Worldly Energy with his will, they were more sensitive to it than Riveting Night.
Both of them had been born with a high State of Being, whereas Riveting Night only gained hers through a potion.
They couldn't 'see' the tendrils and whatnot, but they could certainly sense them. They felt that Draco had gathered all this Worldly Energy without directly using his State of Being, which shattered their worldview.
Riveting Night was surprised because the change was so great. Draco had gone from struggling with just a wisp of Worldly Energy to being able to pull such a hefty torrent, though he was tired out right after.