I am Setsuna | Setsuna's Legendary Spritnite: Holy Light

Go to the Nive Village. Talk to her dad in his house. After you're done talking, go to Dazzshire Wood. Then, take a left turn to activate another cutscene. Nidr will open a new path to a secret area. Go to the north, and you'll get Holy Light spritnite after the conversation ends.

NOTE: There is a mini boss battle on the south in this secret area. If you're ready, feel free to have a battle!