Ben Tennyson (Classic)/Enemies

Vilgax
Ben has a rivalry with Vilgax ever since the original series, but has shown to be helpful for him when Vilgax is in desperate need of help.

Albedo
Albedo has a great hatred for the team, especially Ben, but he doesn't hate Albedo as much. In Trouble Helix, it is revealed that they were once allies. Albedo does not hate Ben nearly as much as he hates Azmuth.

Dr. Animo
Ben used to underestimate Animo until the original series' 4th season. Once he appeared in Alien Force, Ben saw him as a threat, seeing the condition of the Null Void. In Ultimate Alien, he stated that years ago, he thought his plans were dumb. In It's Not Easy Being Gwen, he underestimated him again, forcing him to call Gwen for help.