Film character

Grey Matter

Name: Ben 10: Secret of the Omnitrix
Genre: Action, Adventure, Animation
Released: 2007
Rating: 7.5

Ben 10: Secret of the Omnitrix 2007

played by Richard Steven Horvitz

7.5/10 · 5,955 votes ActionAdventureAnimation

View on IMDb ↗

The film

After a battle with Dr. Animo in a power plant, Ben notices something strange is happening with the Omnitrix but doesn't tell anyone. Tetrax arrives and tells them the Omnitrix is broadcasting a self-destruct signal. Tetrax and Ben go to find the creator of the Omnitrix to fix it before it destroys itself and the universe along with it. Gwen stows away to help her cousin.

Synopsis from TMDB.

The name

Grey is the first name of 22 characters →
Matter is the surname of 4 characters →
Grey Matter: 2 characters bear this exact name →

Also in Ben 10: Secret of the Omnitrix

Alien #1 Ben 10: Secret of the Omnitrix 2007 played by Dave Fennoy
Alien #2 Ben 10: Secret of the Omnitrix 2007 played by Dave Wittenberg
Alien Prisoner #2 Ben 10: Secret of the Omnitrix 2007 played by Dave Fennoy
Ben Tennyson Ben 10: Secret of the Omnitrix 2007 played by Tara Strong
Gwen Tennyson Ben 10: Secret of the Omnitrix 2007 played by Meagan Moore
Incarcecon Security Ben 10: Secret of the Omnitrix 2007 played by Jim Ward
Max Tennyson Ben 10: Secret of the Omnitrix 2007 played by Paul Eiding
Nightmarish Alien Ben 10: Secret of the Omnitrix 2007 played by Steve Blum

Elsewhere on screen, Grey

Grey Bradnam - UKNR Chief Correspondent District 9 2009 played by Jason Cope
Grey Trace Upgrade 2018 played by Logan Marshall-Green
Grey Ellison Curly Sue 1991 played by Kelly Lynch
Grey Beaver White Fang 1991 played by Pius Savage
Grey Wolfmeyer The Upside of Anger 2005 played by Danny Webb
Grey Haired Woman L'Argent 1983 played by Sylvie Van den Elsen
Grey Haired Woman's Father L'Argent 1983 played by Michel Briguet
Grey Hoodie Kristy 2014 played by Lucius Falick