Ben's Team/UAF

Ben's team is the team Ben forms after his grandfather, Max Tennyson disappears. Without his grandfather's guidance, he assembles a team under his grandfather's last orders to him. This team assists Ben in his duties to defend Bellwood from hostile alien activity.

Members
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 * Benjamin Kirby Tennyson
 * [[Gwen Tennyson|Gwendalyn Tennyson ( leader)
 * [[Kevin Levin|Kevin Ethan Levin
 * Verdona Tennyson
 * Max Tennyson
 * Julie Yamamoto
 * Ship

Plumber Helpers

 * Alan Albright
 * Helen Wheels
 * Manny Armstrong
 * Pierce
 * Cooper Daniels
 * Azmuth
 * Paradox
 * Reinrassic III
 * The Galactic Enforcers
 * Elena Validus
 * Jimmy Jones (in Fame)
 * Colonel Rozum (in Fame)

Relatives

 * Plumbers (in Ben 10 Returns & Darkstar Rising)
 * Magister Pyke (Deep)
 * Ken Tennyson (in Max Out)
 * Bivalvan (in Fame)
 * Galapagus (in Escape From Aggregor)
 * P'andor (in Too Hot To Handle)
 * Andreas (in Andreas’ Fault)
 * Ra'ad (in Fused)
 * Carl Tennyson (in Grounded)
 * Sandra Tennyson (in Grounded)
 * Verdona Tennyson (in What Are Little Girls Made Of? and Vilgax Attacks)
 * Frank Tennyson (in What Are Little Girls Made Of?)
 * Lili Tennyson (in What Are Litttle Girls Made Of?)
 * Tyler (in Inside Man)
 * Tetrax Shard (in The Secret of Chromastone)
 * Chromastone/Sugilite, Guardian of Petropia (in The Secret of Chromastone).
 * Tiffin (in The Con of Rath)
 * Mrs. Levin (in Vendetta)
 * Charmcaster (Where the Magic Happens)
 * Rhomboid Vreedle (in The Enemy of My Enemy)
 * Octagon Vreedle (in The Enemy of My Enemy)
 * Magister Korwak (in The Enemy of My Enemy)

Dead People

 * Magister Labrid (in Ben 10 Returns: Part 1; died in Ben 10 Returns: Part 2)
 * Magister Prior Gilhil (in Darkstar Rising; died in flashback in Escape From Aggregor)
 * The Sentinel in (Perplexahedron; almost killed by Aggregor and died in Ben's arms)

Enemies

 * Mike Morningstar/Darkstar (in All That Glitters, War of the Worlds, and Absolute Power)
 * Baz-L (in Pier Pressure and Vreedle, Vreedle)
 * Vilgax (in Ghost Town)
 * Argit (in Simple and Andreas’ Fault)
 * Simian (in Birds of a Feather)
 * J.T. (Reflected Glory)
 * Cash (Reflected Glory)
 * Oliver Thompson (Reflected Glory)