This is Bloodshot!
Bloodshot is one heck of an anti-hero who's found in Valiant Comics rather than Marvel Comics. He is a former military soldier or a former assassin for a mob or whatever life he used to live before he was seized and sold to a highly top-secret government-funded scientific institute known as Project Rising Spirit where he was used as a test subject that was injected with billions and billions of tiny computer bugs called nanites that gives him the ability to become a super soldier. These microscopic robots, once injected into the man's bloodstream, equips Bloodshot with all sorts of incredible superpowers that allow him to gain super strength, the ability to heal quickly, rejuvenate his limbs when they are torn off, reform and repair his body in a matter of minutes when they are badly damaged by a missile, survive in extreme environments and temperatures, shape-shift into different forms, and much more.
The only major downside to all of this is that the nanites also completely erase all of Bloodshot's true memories and replace them with multitudes of false memories that drives him to engage in one harrowing mission after another based on the false memories placed inside him by the scientists of PRS who brainwashed him into carrying out missions of destruction based on the current memories he harbors.
When he became aware of what's going on, Bloodshot ends up escaping from PRS and embark on a journey to search for his real identity, seek the truth about his past, and battle against evil and get revenge on those who destroyed his life.
When I first saw this Valiant comic book character, I ended up mistaken him for The Punisher because he and Frank look so much alike. Both have strong killer instincts, both are highly military trained, both are highly experts in hand-to-hand combat as well as using firearms and heavy artillery, both were born to wage war and take out criminals in the most brutal and violent ways, and here is where the similarities end.
And finally Frank (my version of him) plays the harp. Ray never played a single instrument... or does he?
Can Bloodshot play the harp or can't he? Is this real or is it some fake ability implanted in his mind by the nanites? We don't know. What we do know is that if this is a true memory rediscovered and not some made up vision, this could be something Ray can do to quiet the demons inside of his mind for real.