- "Your ticket please!"
- —Rail Tracer to Rachel
Felix Walken (フェリックス・ウォーケン Fericcusu Wōken), formerly known as Rail Tracer (レールトレーサー Rērutorēsā), introduced as Young Conductor and born Claire Stanfield (クレア・スタンフィールド Kurea Sutanfīrudo) is the legendary freelance assassin Vino (ヴィーノ Vīno, Italian wine), who is hailed as the best in the world.
The name Vino references the way he mutilates his targets, leaving them caked in a layer of blood and looking like they are soaked in wine. He was adopted into the Gandors at a young age and is considered the fourth Gandor brother. Despite this, he is not considered to be part of the family. In 1925, Huey Laforet visited New York City in the hopes of meeting Claire, who he described as a genius, but Claire ran away from home to join the circus and became an acrobat. He uses the strength and agility he gained from his training in his trade. It should be noted that he is also nearly unstoppable in physical combat. In addition to being an assassin, he also works as a conductor aboard the transcontinental train Flying Pussyfoot, making it easier for him to travel to his targets. When the train is hijacked, he assumes the identity of the Rail Tracer, a monster that eats train passengers, to kill train hijackers and ensure the passengers' safety. He meets and proposes to Chane Laforet at the train incident. Later, they meet in Manhattan, where Chane has joined the gang of Jacuzzi Splot. He later purchases the name Felix Walken from a retired assassin. His great-grandchildren are named Claudia Walken and Charon Walken.
At first when he was introduced the Young Conductor seemed like a very handsome, very happy-go-lucky kind of person, with a penchant for telling stories about trains. He was very close to his mentor Tony, and loved the trains very much.
However when Claire adopted the identity of the Rail Tracer he showed that he is a psychotic, yet philosophical, maniac, something of a very deranged warrior poet; Claire's psychology is twisted and mental even by Baccano's standards, complete with the solipsistic ideology that one's own mind is the only thing sure to exist and in the anime, he says that he cannot die because the world is only a dream and that all people might just exist in his imagination. Therefore, if he were to die there he would just wake up. He truly believes that with all of his heart and thus has no interest in immortality because "It can do nothing for him".
While at first his killings can be seen as having no connection to reality, he operates outside the law under his own unique and somewhat twisted sense of justice and what is right and wrong with and in the world. That is not to say that he is inhumane, however. For despite his brutally maiming his targets and his life as an assassin, Claire is truly kind and protective to innocent people, going out of his way to protect them, adopting the Rail Tracer persona on the Flying Pussyfoot, and buying Felix Walken's name to give him a cover. Claire also has a lot of mercy and compassion, and attributes that only the strong are capable of possessing these qualities.
He is not above putting down his fellow assassins when he defeats them in battle.
The name "Vino" is well feared in the criminal underworld as seen when Gustavo became terrified at the prospect of having to face him, hiring freelance assassins left and right just to kill him. Defeating him is the dream of many powerful and proclaimed assassins. He is said to be the equal to Ronnie Sukiart, a demon.
His speed, strength and dexterity are far beyond the boundaries of an ordinary human, first showcased on the Flying Pussyfoot where he became the Rail Tracer and was enough of a threat to be considered an entire third faction of his own against several homocidal hitmen from the Russo Family and the Lemures Cult that worshiped Huey, he basically managed to take down and severely traumatize both parties. He defeated the highly dangerous and well feared hitman Ladd Russo, known for his ruthlessness and killing capability, and took down several assassins, even severely crippling the "Vampire" Class homonculus Christopher Shouldered. Even at a young age he showed this promise catching the attention of Huey Laforet. Ever since the incident on the flying Pussyfoot, Immortal Czeslaw Meyer has become afraid of him to a high degree that persists even towards to 2002 storyline, proving that Claire has the ability to bring even the immortals down a few scales on their power-meter. On the flying pussyfoot, he showed tremendous acrobatic skills moving under and over cars without any problem. To Claire, the chaos on the Flying Pussyfoot was like a "walk in the park" further elaborating just how frightening his capabilities really are.
With only short battles and unexpected means he defeated four powerhouse assassins that were hired by the Runorata Family without much difficulty at all and walking away unscaved, in fact Claire has even walked away unscathed from battles with supernatural being such as Adele and immortals like Berga.
His Solisiphistic persona also gives him somewhat controversal, but effective and surprising ideas in the midst of battle. One example would be using Christopher's eyes to see the chakrams approaching him from behind or taking the guise of Felix Walken to infiltrate the Runorata's hired assassins.
Throughout his battle with Christopher, he held back severely just to fight longer with Chane. Once she left, he took him down with one attack that has left him in shock.
He possesses the mental instability (what some would call insanity) to feel no guilt, and is very charismatic, intelligent and perceptive, capable of grasping even the warped mind of Ladd Russo and tricking him into jumping off the train. He also deduced Huey and Chane's connection without much information.
Claire's father and the father of the Gandor Brothers were on very good terms and as such Claire spent much of his early childhood with his one-day adopted family. Presumably around this time is when he also befriended Firo Prochnazeo. At some point Claire was orphaned and taken in by his family's long time friends the Gandors. Keith, Luck and Berga retain a close relationship with him after this and consider him to be their fourth brother. However for reasons yet to be disclosed Claire ran away with the circus. It was around this time that Huey Laforet and Chane Laforet ironically sought him out but settled on conscripting Tack Jefferson instead.
Claire's time in the circus helped him to hone his strength and agility to beyond anything that had been seen prior or since. Eventually Claire left the circus and began his life as an assassin where he retained his possitive relationship with his adoptive brothers and the Martillo Family.
One of his known hired jobs involved Don Bartolo Runorata hiring him to clean up his competition and within the night all of the Runorata's targets had been killed.
By the twenty-first century Claire married Chane and now has great-grandchildren child-actors duo Claudia and Charron Walken. He has also left a phycological scar on the not-so-young Czeslaw Meyer who avoids his relations because of this phobia.
Even pushing Ninty Claire retains his daredevil and thrill-seeker ways and during 2002 he is scuba diving for treasure.
Chane Laforet - In the anime and books, Claire is completely and utterly in love with her. After Claire encounters her on the train, he proposes the idea of marriage to Chane, baffling her. Having been separated afterwards, Claire has promised to find her somewhere in Manhattan after he fulfills his obligation to the Gandor Brothers. Despite the fact that Claire has a very casual and nonchalant way of approaching love, proposing immediately after taking a fancy to them then getting rejected and moving on to the next, it's shown that he is unusually hopelessly in love with Chane, unable to move on from her like all the rest. Although Chane struggles with her feelings, Claire easily declares his love and devotion for her, a notable reason being that she has basically engraved proof of her existence in his world, with the nick on his ear when Chane was climbing up the side of The Flying Pussyfoot, unintentional as it was. It's revealed in the 2002 novel, that Chane and Claire got married after Chane eventually fell in love with him.
Claudia Walken - Claire's great-granddaughter in the books. She is a lot like Claire; Claudia thinks the world is hers and just like Claire if she dies she will just wake up to find that it was just a dream.
Charon Walken - Claire's great-grandson, he is very quiet and takes most of his personality from Chane.
Huey Laforet - Huey is Claire's father-in-law. Huey and Claire met in the 1935 - B Dr Feelgreed manga. Initially, Claire asked Huey if he was Chane' s brother. But Huey calmly corrected him, introducing himself as Chane' s father.
Firo Prochinazeo - Firo and Claire were childhood friends.
Renee Paramedes Branvillier - Renee is Claire Stanfield/Felix Walken's mother-in-law. They met when Claire caught Renee attempting to break into Runorata manor. Noticing features that Renee and Chane share that most people would never be able to notice, he initially asked her if she was Chane's sister, but she told Claire she's Chane's mother.
- Despite not having his name revealed in the opening (though he does make a brief cameo), he plays a vital role in the story. This was done so as to not spoil his identity as Rail Tracer or even the fact that he had survived being shot.
- He is the Franchise's most popular character, however the author has no intention about writing a story with him as the main character feeling that it would "move too fast without any plot or action"
- The Author has described him as a "Baccano's Number One Problem Child".
- Claire Stanfield uses many aliases throughout the story (Claire Stanfield, The young conductor, Felix Walken, Vino, The Rail Tracer).
- In the ending credits, he is credited with Jerry Jewell as his voice for the Rail Tracer in the Funimation Dub, but only actually speaks once as the Rail Tracer before his identity was revealed. Furthermore he is the only character who has a two word name cited in the ending of Baccano (both when he is credited as the Young Conductor and Rail Tracer.)
- Several different adaptations have his hair in different shades of red. Though the light novels depict his hair as a blood-red, the anime uses a less gory colouration in the earlier episodes, the manga uses a gingery shade, and some official artwork (and fanart) depicts him as rusty shade. A colouration error occurs in the anime miscolouring his hair colour during his confrontation with Czeslaw Meyer to match the manga.