Dark One
Dark Ones are a race of light-averse humanoids native to the Underdark (and/or Shadowfell) of Dungeons & Dragons, who have shown up over multiple editions. They are traditionally divided into two subraces; the Dark Creeper, a small sized, furtive creature resembling something like a cross between a gnome and a satyr, whilst the Dark Stalker is a taller, more humanoid being. They also appear in Pathfinder, where they are called Dark Folk.
The race first appeared in the Fiend Folio for Advanced Dungeons & Dragons 1st edition, and were updated to AD&D 2e in the Monstrous Compendium Fiend Folio Appendix. In 3e, they returned in the 3e Fiend Folio, and had an Ecology article in Dragon #322, where they received a PC status - this was when Dark Creepers and Dark Stalkers were first established to be different subraces of the same Dark One race. They fared better after 3e, appearing in the Monster Manuals for 4e and 5e, and in the first Pathfinder bestiary, with Pathfinder expanding upon the race's history and lore in the Bestiary 5, which also introduced the Caligni.