There are many legendary creatures in Infinity Nikki. Some come with a quest while some others are well-hidden, requiring Stylists to explore the world thoroughly to find them. Examples of legendary creatures in Infinity Nikki are the Dawn Fox, Tulletail, Bullquet, and the Astral Swan.
Grooming the Astral Swan and obtaining its Astral Feather can be done even without following the nearby quest, but players can use the mission to learn more about the creature. The mission involving the Astral Swan is called Soaring Above the Starry Sky quest in Infinity Nikki.