The male protagonist of the story, he is the eldest son of the "House of Jones," a wealthy merchant family striving to ascend into the gentry. As his father's heir, he faces immense pressure not only to take over the family business but also to marry a woman from another affluent family, ideally with connections to the peerage. He developed feelings for Emma after their initial encounter. He frequently intercepts her on Regent Street as she returns from Covent Garden. In the manga, William confided in his father about Emma, though his father never met her (unlike in the anime).
Following Emma's departure, William underwent a significant transformation. He dedicated himself fervently to his work, attending social gatherings and managing his family's business affairs. From his perspective, he never ceased regretting the loss of Emma, yet he resolved to live his life according to his father's expectations within the 'upper class side.' His metamorphosis had a profound impact on those around him, including Hakim.
