Through the versatile application of his ability Adamant is a front-line bruiser. He can distort his armor into a variety of useful shapes through Metallokinesis, such as a blade to cut through restrictive material or into a completely solid piece keep things from getting into his armor. His ability allows Adamant to wear heavy armor without actually having to worry about being encumbered by it, in fact he can use it to supplement his own strength and durability . Further he can actively repeal or deflect other metallic objects with his ability. His armor is partially mechanical which allows him to move with more mass, though this does take maintenance to use it.
His powers make him durable enough to go toe-to toe with one of Hellhound's Mutant dogs. His metal manipulation is more for close up direct combat.
↑Adamant – A durable cape who showed up following the Echidna arc. Wears a black costume with metal plates chained together. - Cast (in depth)
↑ 2.02.1Adamant had distorted his metal armor to create a completely form-fitting metal suit, with only the thinnest possible slits for his eyes, before venturing outside. He’d waded through my swarm, mostly blind, and he’d only just found Sere beyond the wall at the school’s perimeter. He reshaped an armor panel into a weapon to start cutting Sere free.
Could I have caught Adamant too? Probably. But it wasn’t worth the effort, not when he could reshape metal, with enhanced strength and durability on top of that. - Excerpt from Chrysalis 20.5
↑“Tell the others,” Miss Militia said, “Adamant’s getting a cycle retooled to handle more weight before he leaves again. He’ll go with Triumph. Log it all in the system.” - Excerpt from Cell 22.3
↑ 5.05.1Adamant got into close quarters combat with the dog, slashing at it with pieces of his armor and driving the animal back.
Rachel whistled, shrill, and two dogs tackled him. He delivered one good swipe before the other blindsided him. The disadvantage of forming a full covering of armor was that it limited his peripheral vision.
She wasn’t going even two seconds without giving a command. There were five dogs in the field, or four dogs and one young wolf, and many were lacking in serious training, so she managed them with lengths of chain between their collars and Bentley’s, and by giving enough commands that they wouldn’t have time to get creative and go after one of the PRT uniforms. - Excerpt from Imago 21.1
↑Adamant can manipulate metal around him, it's very brutish, strength-focused. Lots of slamming and such. He can form metal into a crude armor around himself and gather metal into rough weapons, like greatswords, mauls, axes, etc. Finally, use of metal weapons against him or wearing metal armor while going up against him in close quarters means your attacks may get shoved aside before they land and you might have your footing disturbed. Very 'brute' in approach - his ability to boost attacks & defense while armored/wielding metal make him a heavy hitter that's good at staying in the fight, especially since he can repair damaged armor using his ability to slowly shape and refine metal. - Comment on Reddit