|Status||KIA (Army Men: Sarge's War)|
Colonel "Happy Jack" Grimm is the commanding officer of Bravo Company, thusly Sergeant Hawk's direct commanding officer. Col. Grimm also has a daughter named Vikki Grimm. He makes minor appearances in the Sarge's Heroes series, Army Men: Air Tactics, Army Men: Sarge's War and Army Men: RTS. He is also a playable character in the multiplayer of Army Men: Sarge's Heroes and Sarge's Heroes 2. Depicted as a sympathetic officer who has probably seen combat in some forgotten war.
The last time Grimm is seen is during the Peace Treaty signing during Army Men: Sarge's War where a number of Bravo's Company Commandos along with Grimm and Vikki are killed by Lord Malice's bomb rigged peace statue.
- Grimm will often speak in two different accents depending on what game he's in. It is unknown which is the true accent.
- Grimm is bald. His appearance without hat can be seen in Portal Runner's ending, when Vikki, his daughter, hugs him.
- A popular fan theory is that Colonel Grimm was possibly "Sarge" in the Army Men games prior to Sarges Heroes; although no hard evidence besides facial features supports this.