There is one Main Deck "Familiar-Possessed" monster for each six main Attribute, as well as one Link Monster for four of those six Attributes. The Main Deck "Familiar-Possessed" monsters each have an effect that allows it to be Special Summoned from the hand or Deck by sending one "Charmer" monster and one other monster, both of the same Attribute as the "Familiar-Possessed" monster, from the player's field to the Graveyard, and when Summoned in this way, gives the "Familiar-Possessed" monster a piercing effect.
As the name suggests, each "Familiar-Possessed" monster features a familiar, a more fierce-looking version of a Level 1 or 2 monster with the same Attribute as the "Familiar-Possessed" monster.
"Familiar-Possessed - Eria" appears as a character in Yu-Gi-Oh! World Championship 2007 and in Yu-Gi-Oh! 5D's World Championship 2009: Stardust Accelerator.
Originally, there were only four "Familiar-Possessed" monsters, released in Elemental Energy (one for each elemental Attribute of FIRE, WATER, WIND, and EARTH), until the DARK "Familiar-Possessed" monster was released in Order of Chaos and the LIGHT "Familiar-Possessed" monster was released in Maximum Crisis. The "Familiar-Possessed" monsters are more advanced versions of the "Charmer" monsters, similar to the Cataclysmic Charmers and the Spiritual Arts.
|Familiar||Meda Bat||Archfiend Marmot of Nefariousness||Fox Fire||Happy Lover||Gigobyte||Petit Dragon|
|Unpossessed Familiar||None yet||Nefarious Archfiend Eater of Nefariousness||Inari Fire||None yet||Jigabyte||Ranryu|
|Awakened Familiar||None yet||Archfiend Reaper of Nefariousness||Great Inari Fire||None yet||Gagigobyte||Rasenryu|
|Link Monster||None yet||Aussa, Immovable||Hiita, Ablaze||None yet||Eria, Gentle||Wynn, Verdant|
|Channeler||None yet||None yet||None yet||None yet||None yet||Wynn|
|Cataclysmic Charmer||None yet||Avalanching Aussa||Blazing Hiita||None yet||Raging Eria||Storming Wynn|
Ariel, Priestess of the Nekroz
|Winda, Priestess of Gusto|