Heroes[]
- Ben Tennyson
- Ben 10,000 (Current Future)
- Ben 10,000 (Former Future)
- Ben Tennyson (Ultimate Ben Dimension)
- Ultimate Ben 10,000
- Albedo (Ultimate Ben Dimension) (during season 3 and 4)
- Ben Tennyson (Dimension 23)
- Ben Tennyson (Gwen 10 Timeline)
- Ben Tennyson (Young Ben)
- Ben Tennyson (Alien Force)
- Ben Tennyson (Ultimate Alien)
- Nega Ben (during season 4)
- Mad Ben (during season 4)
- Albedo (during seasons 3 and 4)
- Bad Ben (during season 4)
- Benzarro (during season 3 and 4)
- Ken Tennyson
- Kai Green
- Julie Yamamoto
- Ester
- Deefus Veeblepister
- Tetrax Shard
- Gwen Tennyson
- Kevin Levin
- Rook Blonko
Secondary Characters[]
- Max Tennyson
- Zed
- Azmuth
- Blukic
- Driba
- Professor Paradox
- Sandra Tennyson
- Mr. Baumann
- Pakmar
- Argit
- Blarney T. Hokestar
- Rad Dudesman
- Jimmy Jones