Gaston

Gaston (ガストン), commonly known as Ton (トン), is one of the thugs that attacked Subaru.

Volume 4
Upon arriving at the royal capital, Emilia forced Subaru to hold hands with her, as she didn't trust him by himself, believing that he'd go off and do something if he was left alone. Unfortunately for them, they were holding hands in front of Kadomon's store, causing him to tell them to stop flirting and go away, however he eventually remembered their promise and sold Subaru some ringa. A short while later, the two made their way to the guard barracks, where they met Julius Euclius of the Royal Guard, who Subaru took an immediate dislike to. Subaru tried to accompany them inside but was told by Emilia to wait outside, leading to him fantasizing of punishing Julius in the event that Emilia became king, however he decided to leave when he saw a girl being taken into an alley.

To his surprise, the girl refused his help, going as far to throw him against a wall when he tried to take her with him, claiming that she would do as she pleased. He then recognized the thugs that dragged the girl into the alley as Ton, Chin, and Kan, making him wonder if they were the only thugs in the royal capital. The girl's attitude, coupled with the thugs remembering who Subaru was after a hint, forced him to bring out his "trump card", which was telling the thugs that he was supposedly best friends with Reinhard. Not wanting to fight Reinhard, the thugs retreated for the time being, though they returned later when they realized that Subaru was lying, forcing the two to run from them. Fortunately they were saved by Rom and succeeded in escaping from the thugs.

Trivia

 * Ton, Chin, and Kan's names are a play on the Japanese word tonchinkan which means irrevalent or inconsistent.