He’s lived his life in the shadows for 30 years (1987-2016) in the service of his country, and he likes to be unremarkable yet very efficient. Hellbent on eliminating the presence of the Transformers on Earth, he mercilessly stalks The Daring Dragon Riders, their friends, and families due to their alliance with the Autobots and Trainbots. (but mostly targets Nyx due to Thomas being her adoptive-father).
After the Events of Trainbots II: The Deceptitrains Strike Back,
Attinger was a no non-sense man with strict objectives and zero compassion for his enemies, even if they were innocent people. Though he hated Transformers, he was willing to join forces with them if it meant to farther his goal, such was the case with Lockdown (who shares this believe even though he's a transformer himself) and Timothy (who really wants revenge of Thomas himself). Though all this may come from his years of working in the shadows, causing him to become paranoid and fearful, specially after the battle in Las Pegasus. Strangely, despite being ruthless and paranoid, he was known for his calm and patient demeanor unlike Dylan Gould was. Rarely did Attinger raise his voice or over react to a situation, instead planning it out as it unfolded. Attinger also revealed himself as the Master Manipulator near the climax, as he revealed to Joshua that all this time, he had little to no care towards both Joshua and KSI despite considering them as his "golden parachute of his goal". Despite claiming himself to be saving the world from the threat of the Transformers, a majority of the destruction and death in the film is caused by him and his organization of Cemetery Wind. Whether he sees it or not, he's a hypocrite considering that he couldn't allow any rescue services to recover the injured when innocent people were caught in the crossfire of Galvatron's attack on the Autobots and Trainbots, and even allows Lockdown and Timothy to level Diesel City to find Optimus and Thomas and hide his co-operation.
- Harold Attinger makes his appearance in Trainbots III: Battle for Freedom