From Dragon Ball Wiki, the ''Dragon Ball'' encyclopedia
A Halo is a luminous circle that appears above the head of deceased persons if they keep their bodies in the Other World.
 Video game appearances
Halo halves the ki used in special attacks, but takes away 10,000 health points (1 health bar) in Budokai Tenkaichi 3. This item can only be used by good characters, its evil counterpart being Demon Seal. Halo also gives a halo to the following characters: