He looks mostly fine, my only concern is that being able to invent, even if it's a narrow set of inventions, might overlap with one of the other Dolls.

• Name: Shane Gambino, though he goes by his nickname: Gambol Shroud.
• Age: mid-to-late 20s
• Gender: Male
• Appearance: "A believe a proper duel's in order!"
• Personality: Unlike most Doll Hunters, Shane doesn't see the Dolls or their Masters as a threat, rather seeing them as more of a sport. Shane is the definition of gentleman. He's nice to the waiter, treats women with respect, and above all else practices honor. Even if he skirts minor stuff like two-on-one, he's not going for underhanded tactics like holding relatives hostage and hates it when anyone tries it, be they Doll, Master, or Hunter. Shane shows a very cocky attitude despite his gentlemanly demeanour, foolishly and recklessly dueling people and seeing the whole Dolls situation as nothing more than a game. The only additional reason why he's hunting Dolls is because of an experience he had when he was fifteen, but for the most part, he just wants answers than revenge or justice.
• Backstory: Shane Shroud was raised into a rich family. While his father's not directly connected to royalty, people in his neighbourhood treat him as such. When he was ten, his father took Shane to see an old friend, a Doll Hunter who begins to tell the boy of Dolls and why they are a threat to the world. Shane was offered to join the Doll Hunters, but he rejected. He was given a nailgun as a way to "think about it". Five years later, during a hunting trip with his father and a few men, a boar-like monster ambushed them. They tried their weapons on it, but none proved effective. It wasn't until Shane, in a desperate attempt to save his father from getting skewered by the boar, shot it with the nailgun. The boar died, reverted to a human, and the crisis was over. Shane felt a rush come to him as he is hailed a hero. The next day, he joined the Doll Hunters and began to train, never truly knowing what the monster that attacked the hunting party was.
• Skills: Shane is skilled in hunting, just like his father. Though not for Dolls, rather for wildlife such as deer, foxes, and even boars. He is also skilled in fencing, something his mother taught him. Because of his rich upbringing, he is also able to fund a bunch of stuff, though he can only fund so much without getting cut off.
• Weapons: Shane, true to his love for dueling, hired a blacksmith in the Doll Hunters to craft a rapier with a Nailgun molded into the hilt. He coined the name for the rapier: The Peerless Nail, as the tip of the rapier is actually a nail as well. As such, the rapier is very sharp at the point. With him are clips for more Nails to put in.