Ghostly

Ghostly is the name of several shadowy ghosts who haunt the ruins of Magincia during Ultima IV.

Description
The shades would tell the Stranger that they were in search of peace that could never be found, forever banished into the realm of earthbound spirits. They also warned the hero not to be proud of their piddling temporal deeds, lest they too fall forever from the light.

Trivia

 * In the Nintendo remake of Ultima IV (where most character names were omitted and dialogue was significantly modified), the multiple generic Ghostly can be identified with a single generic ghost, who says just "Boo!"