Will -O'-the-Wisps

The Will-O'-the-Wisps are atomspheric ghost lights seen by travelers (at night). It resembles some sort of a flickering lamp.They are hinted to be spirits of the dead (see Mor'du).

Appearances in Brave
(Young) Merida first meets a will-o'-the-wisps when she goes to fetch an arrow she shot on her birthday. Later, after shaming the clans in a game of archery (see Brave (2012)), Merida runs away from the DunBroch kingdom and meets the wisps, which lead her to the witch's cottage.(The Witch (Brave)).

After Merida turns Elinor into a bear (Queen Elinor), they follow the wisps back to the cottage. The wisps appear to her two more times, first to where Mor'du lives, and then her mother to danger.

When Mor'du is killed, his spirit becomes released, and it turns into a wisp.

At the end of the film a wisp waves to the audience before it disappears.

In the Crossover
The Wisps appear to the Big Four, often leading them to places that bring trouble such as Pitch's Lair or Mor'du's castle. They also lead them to places that will play a role (on what ever the Big Four's mission is) such as the Witch's cottage.