Dark Continent Pariston Hill "Nen system unknown"
Vice-president of the Pariston Hill??? Hunter Association, he was one of the Triple Hunter Twelve, but left at the start of the Dark Continent arc.
Hunter Association
Dark Continent 
Dark Continent Gin Freaks "Nen system unknown"
Ging Freaks: In the Dark Continent arc, he joins the Zodiacs and sets out for the Dark Continent. He is a ruins hunter and a two-star double hunter. He is a legendary figure in the world of hunters. Even Satotsu, the examiner when Kite and Gon took the Hunter Exam, respects Ging.
Dark Continent Hisoka Morrow "Transformation" [Flexible Love (Bungee Gum)] [Thin Lies (Surprising Texture)]
Hisoka Morow is a transformation-type ability user. He can change the shape and properties of his own aura. His ability is called "Bungee Gum," which transforms his aura into "adhesive rubber." He can attach his aura to a target by touching it, and shrink it at any time.
Nostrade Group Kurapika "Materialization/Specialty" [Emperor Time] [Chain Jail] [Holy Chain] [Dowsing Chain] [Steel Chain] [Judgment Chain]
Kurapika is a Materialization/Specialty type ability user. He is normally a Materialization type, but when his Scarlet Eyes are activated, he has a special constitution that makes him a Specialty type. His normal Nen type is Materialization. He only becomes Specialty when his Scarlet Eyes are activated. His eyes change color when he is extremely angry, becoming Scarlet Eyes, a special characteristic of the Kurta Clan. Kurapika...
Dark Continent Bill "Strengthening Type" [Bulb (Halcyon)]
Bill is an Enhancement-type ability user who appears near the Dark Continent. He is a member of the Hunter Association. His ability, Bulb (Harujion), is to promote (strengthen) the growth of the target object. When used on plant seeds, it can cause them to germinate. If it also has an effect on humans, it could include "growth that would result from training"...