The Hulex Colonel is an unnamed character that appeared in Food Around the Corner and was the one in charge of the Hulex digging on Gravattack's core to cause a meltdown to kill Vexx, Malice and Caitiff.
The Colonel seems very devoted to his work and was willing to sacrifice himself and members of his own kind to get the job done. This was shown when he kept drilling and tampering with Gravattack's core, being fully aware of the consequences and knowing full well that he and his men would survive, despite Rook's warnings of what would happen if they succeeded.
Ben 10: Omniverse
- Food Around the Corner (first appearance)