Number holder

A Number holder is one who came into contact with and wielded a "Number" card in a Duel.

Possessed Duelists

"Numbers" have the ability to possess people, and do so when they are initially released. Numbers can have varying control over people, from increasing their already present emotions (as in the case with Flip) to actually controlling and manipulating their mind (as with Nelson Andrews). Some "Number"-possessed wish to gain more "Numbers" (Number 20's holder, Chills, and Scorch). Possessed Duelists can usually be seen with glowing purple pupils and a dark glowing aura around their body. "Number 7" is the only one that does not possess the Duelist and instead gives them luck, which is seen as a rainbow aura.

Known Possessed Duelists

Name	Number(s)	Status
Kaze	Number 12: Crimson Shadow Armor Ninja	Defeated (by Yuma in episode 16)
Number 16's holder	Number 16: Shock Master	Defeated (by Fortuno in episode 17)
Reginald Kastle	Number 17: Leviathan Dragon	Defeated (by Yuma in episode 2/rank 4)
Flip	Number 17: Leviathan Dragon Number 39: Utopia	Defeated (by Yuma in episode 6/rank 6)
Chills	Number 19: Freezerdon	Defeated (by Yuma in episode 12)
Number 20's holder	Number 20: Giga-Brilliant	Defeated (by Kite in rank 7)
Syuta Hayami	Number 25: Force Focus	Defeated (by Yuma in episode 36)
Mr. Kay	Number 34: Terror-Byte	Defeated (by Yuma in episode 4)
Number 56's holder	Number 56: Goldrat	Defeated ( by Kite in episode 13)
Scorch	Number 61: Volcasaurus	Defeated (by Yuma in episode 12)
Nelson Andrews	Number 83: Galaxy Queen	Defeated (by Yuma in episode 8)
Number 96's holder	Number 96: Dark Mist	Defeated (by Yuma in episode 20)
6 Unnamed Duelists	Unknown	Defeated (by Kite in episodes 17 and episode 31)

Number Hunter

A Number Hunter (ナンバーズ・ハンター, Nanbāzu Hantā) is a person who collects "Number" cards for one reason or another. Kite Tenjo claimed himself to be a Number Hunter, being the only one, but later he identified Yuma Tsukumo as a Number Hunter. Yuma most likely does not consider himself a Number Hunter, after seeing what Kite Tenjo does after he defeats a holder, but he falls into the category, as he and Astral both collect "Numbers", and have a motive for it. Number Hunters have ways of detecting when a Number holder appears, and a method to take away that Number when they defeat it. A Number holder possessed by the card wanting more "Numbers" cannot be considered to be a Number Hunter, as their motivations are not their own, but by the "Number's" will.

Known Number Hunters

Anime

Name	"Numbers" obtained	Method to take "Numbers"	Reason to collect "Numbers"	Status
Kite Tenjo	15	Photon Hand	Heal his brother - Failure	Defeated
Yuma Tsukumo	14	Astral	Recover Astral's memories	Active
Dr. Faker	Unknown	Unknown	To rule Earth	Active
IV	10	Unknown	Revenge against Dr. Faker - Failure	Inactive (Number 32 was given to III by V)
Droite	Unknown	Unknown	Serve Mr. Heartland	Inactive
Gauche	Unknown	Unknown	Serve Mr. Heartland	Inactive
Fortuno	3	Photon Hand	Serve Kite - Failure	Defeated

Manga

Name	"Numbers" obtained	Method to take "Numbers"	Reason to collect "Numbers"	Status
Kite Tenjo	2+	Photon Hand	Heal his brother	Active
Yuma Tsukumo	5	Astral	Recover Astral's memories	Active
Luna	Unknown	Unknown	Eliminate the "Numbers"/Stop Dr. Faker's ambitions	Active
Captain Corn	2+	Unknown	Serve Mr. Heartland - Failure	Defeated
Thunder Spark	1+	Unknown	Serve Mr. Heartland - Failure	Defeated
Cologne	1+	Unknown	Serve Mr. Heartland - Failure	Defeated

Resistances

These people are immune to the corrupting effects of "Numbers" and can fight against them despite not having any "Numbers" of their own. They either borrowed another person's "Number" or previously had one and now use a different method to defeat them, instead. They seem to gain some immunity by having a large amount of will (Bronk wishing to save Yuma and Shark trying to protect Yuma's Key) or had no interest on finding "Numbers" for themselves.

Known others

Name	"Number(s)" possessed	Reason	Status
III	Number 6: Chronomaly Atlando Number 32: Shark Drake Number 33: Chronomaly Machu Mech	Serve Tron - Failure	Defeated ("Number 32" given to Shark, and "Numbers 6" and "33" to Yuma)
V	Number 9: Canopy Star - Dyson Sphere	Serve Tron - Failure	Defeated ("Number" given to Kite)
Bronk Stone	Number 39: Utopia (from Yuma)	Save Yuma from Number 96: Dark Mist - Success	Inactive ("Number" borrowed from Yuma but returned later)
Charlie McCoy	Number 7: Lucky Straight (stolen)	Help his niece - Success	Defeated ("Number" given to Mayumi)
Mayumi	Number 7: Lucky Straight (given)	To be cured from her illness - Success	Inactive ("Number" given to Yuma off-screen)
Reginald Kastle	Number 30: Acid Golem of Destruction (changed control) Number 32: Shark Drake (given away)	Protect Yuma's Key - Failure Revenge against IV - Success	Defeated ("Number 30" returned) Defeated ("Number 32" was given to him by III)
Tron	Number 6: Chronomaly Atlando Number 8: Heraldic King Genome Heriter Number 10: Illumiknight Number 20: Giga-Brilliant Number 30: Acid Golem of Destruction Number 56: Goldrat Number 69: God Medallion Coat of Arms Several unknown "Numbers"	Revenge against Dr. Faker	Active ("Number 6" given to III)