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Sven is a veteran sweeper, who takes the role of a mature figure in the manga. He follows a strict "gentlemen" code; he is always respectful to women and children and acts very proper. He is often tortured by Train's capricious personality and is usually dragged into trouble (and debt) because of it. He also has quite a close relationship with Eve.<br />
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Sven is also skilled in inventing and making innovative weapons and other various equipment. This includes bombs and special bullets for Train. Sven's weapon of choice was originally a normal pistol, but after that was destroyed, he invented a suitcase equipped with hidden weaponry inside of it. He occasionally uses his eye of foresight, which is usually covered by his black eyepatch. It allows him to see a few seconds in the future and proves convenient sometimes. However, it drains much of his physical energy.<br />
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In the past, Sven was originally an IBI (International Bureau of Investigation) detective. His partner and friend was Lloyd Goldwyn, who had the ability of clarvoyance. Lloyd died by saving Sven from a gang of drug dealers, as it was Lloyd's daughter's birthday and Sven tried to go alone, but Lloyd foresaw Sven's danger and showed up to save him, getting shot in the process. Before he died though, Lloyd donated his right eye to Sven, whose eye was ruined by being hit by a wrench. This is how Sven received his foresight ability, called Vision Eye.<br />
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The Vision Eye allows Sven to see a time range from seconds to minutes in the future, and consumes much energy, making Sven have to rest every time he uses it. On the final part of the manga, right before the attack on Clarken Island, Sven develops his Vision Eye into a new skill, not related to Lloyd, but belonging to his pure personal vision of things, which is Grasper Eye. This ability not only lets Sven use it during more time, and consuming less energy, but also means a great change: Sven can not only see the future, but also alter it. <br />
