Poe Sisters

The Poe Sisters were four ghostly siblings named Amy, Beth, Joelle and Meg. They haunted the Forest Temple for many years until Link was able to put their souls to rest. When defeated, each yielded a different colored flame that illuminated a torch at the center of the temple. When all four torches were lit, Link was granted access to the temple's basement, where Phantom Ganon waited.

In Majora's Mask, they haunt the Spirit House of Ikana.

In Twilight Princess, they haunt Arbiter's Grounds. They look much more like actual people this time and are killed just as you would kill a normal Poe.