The term Guardian can refer to several characters, concepts or groups in Transformers:

• 1985 — Guardian, the Autobot battle drone from the Generation 1 Marvel Comics UK continuity.
• 1985 — Guardian robots, giant Transformer drones from Generation 1.
• 1986 — Guardian, the Japanese name for Defensor in Generation 1.
• 1986/2010 — Guardian Prime, the Autobot from the Generation 1 cartoon.
• 1986 — Dark Guardians, Quintesson predecessors of the Guardian robots from the Generation 1 cartoon.
• 1990 — The "Nucleon guardians", inhabitants of Hydrus Four from the Marvel comics.
• 1993 — The guardian of powerful alien technology from Generation 2.
• 2005 — "Guardian", the 47th episode of the Cybertron cartoon.
• 2006 — Omega Guardians, ancient drones from the original IDW Generation 1 comics.
• 2008* — Guardians, the good guy faction from the Tonka GoBots series.
• 2009 — The Guardian Microns (Guardian Powered, Guardian Sky, and Guardian Speed), a trio of Mini-Cons from the Revenge of the Fallen toyline.
• 2010 — Guardians, the ancient Cybertronian faction from Animated.
• 2010 — The Silver Guardians, a subgroup of Autobots from Animated.
• 2010 — The Energon Bridge Guardian, a device from the War for Cybertron game.
• 2012 — Guardians, the Decepticon guards from Fall of Cybertron.
• 2012 — Gaia Guardian, the Protectobot combiner from Kabaya.
• 2012 — God Guardian, the other Protectobot combiner from Kabaya.
• 2015 — Guardian Major, the Autobot from the Unicron Trilogy continuity family.
• 2017 — Guardian, the tiny Autobird from Angry Birds Transformers.
• 2017 — The Guardian Knights, a faction of Transformers from The Last Knight.

Not be confused with

• DK-2 Guard

*First appearance in Transformers fiction.