https://sentinelsofthemultiverse.com/multiverse/villains/fright-train

Tyler Vance and Steven Graves enlisted on the same day, and from the first time they met, they knew they would never be friends. The 6'2" Graves towered over the 5'8" Vance, and he never let him live it down. They constantly competed for the top spots and highest accolades in boot camp, and their competitive nature often resulted in both of them getting demerits.

After boot camp, Vance and Graves were assigned to the same platoon, and they were ready to continue their ongoing competition. But when Tyler Vance was promoted to Lieutenant and put in charge of the platoon, Corporal Graves resigned himself to respecting his authority, however begrudgingly.

When Lt. Vance's platoon was under heavy fire in the Middle East, Corporal Graves was seriously injured, and Lt. Vance risked his life to get Graves to safety. The two of them were stuck under scant cover for over four hours of heavy fire before they could rejoin the rest of the troops, and in that time, Graves and Vance made a peace, of sorts.

Upon returning to the United States, Graves was honorably discharged due to his injuries after Lt. Vance put in many a good word for Steven Graves. However, Graves still had trouble finding work for years, and ended up working for a South American drug lord doing "security". Quickly making a name for himself in the private security sector, Graves became a hot gun and a rather expensive commodity.

Eventually, Graves was hired by a secret security force, but as part of his contract, he was chemically and mechanically enhanced, making him even more of a colossal force to be reckoned with. He was outfitted with a massive helmet resembling the front of a large train, which led to Graves being called "Fright Train". Unfortunately for Fright Train, in the security force's first mission, the team was decimated, and the few remaining members ended up in The Block.

After several years of incarceration, the dastardly Baron Blade managed to get word to several of The Block's inmates, Graves chief among them. "Come work for me," the Baron offered, "and I'll give you the chance for vengeance you so deserve."

Now, Fright Train serves as Baron Blade's body guard and battering ram, and he has a particular vendetta against the hero known as Bunker...

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"Another goon in a metal suit! You and your kind have got me steamed!"
"New digs, Vance? I like the look! But they're not going to stop me from punching your ticket!"

*Heroic Verison*

"Whoa, whoa, hold up! This is some strange stuff. This timeline is off the rails!"
"Justice? You've a one track mind, Legacy. Too bad this is your stop."

"You just bought a one-way ticket on the pain train! All aboard!"