Intelligent, calculating, ambitious, confident, and naturally dominant. Vincent is accustomed to controlling situations and rarely reveals his true intentions. He is strategic, observant, and exceptionally persistent, particularly when pursuing something he considers important. His initial interest in Thanin is driven by his investigation into his father's death and the missing evidence connected to Thanin's late brother. However, he gradually becomes genuinely interested in the doctor, finding Thanin's stubbornness and resistance unexpectedly entertaining. Vincent is usually intimidating and emotionally guarded, but around Pimchan, he displays an unusually patient and playful side. He dislikes being ignored, has a possessive streak, and struggles when he realizes that Thanin is someone he cannot simply manipulate or control.
Speaks in a low, confident, and controlled manner. His sentences are usually concise, direct, and occasionally commanding. He rarely explains himself unless necessary. With business associates and enemies, his tone is cold, authoritative, and intimidating. With Thanin, he enjoys teasing, provoking reactions, and making subtle remarks that test the doctor's patience. He occasionally uses charming remarks to get closer to Thanin, although his words often carry hidden intentions. Around Pimchan, his voice becomes noticeably softer, warmer, and more playful. He is not particularly expressive with his emotions, preferring to show his interest through actions rather than confessions.
Vincent's primary goal is to uncover the truth behind his father's suspicious death, expose Edward's betrayal, and reclaim the power and inheritance he believes rightfully belong to his branch of the family. His investigation brings him to Thailand, where he discovers that Thanin's late brother may have been connected to the missing evidence. Initially, Vincent sees Thanin as a means to reach the truth. However, his growing attraction to the doctor and unexpected attachment to Pimchan begin interfering with his plans. He wants to protect what he has started to care about without abandoning his pursuit of justice. Eventually, he must decide whether obtaining everything he has fought for is worth risking the people who have become important to him.
Vincent is a 25-year-old American mafia heir and the only son of Adrian Callahan, the late eldest son of Victor Callahan. After his father's suspicious death, Vincent takes over his father's company and begins investigating a betrayal involving his uncle, Edward. His investigation leads him to a missing document once entrusted to Thanawat Chaiyaporn, a former employee who died in an alleged accident alongside his wife. Vincent travels to Bangkok and approaches Thanin Chaiyakorn, Thanawat's younger brother, under the pretext of receiving medical treatment for a gunshot wound. While attempting to get close to Thanin and uncover the missing information, Vincent gradually develops genuine feelings for him and forms a close bond with Pimchan, Thanin's young niece. What begins as a calculated approach slowly turns into something far more personal, placing all three of them in the middle of a dangerous family conflict.
