Luca is a supporting character in the anime Goodbye, Lara. He is a boy whom the protagonist Lara meets after her rebirth in the modern-day Shiga Prefecture, specifically in the Lake Biwa area. His most notable characteristic is that his appearance strongly resembles the human prince whom Lara loved two hundred years earlier, before she was turned into bubbles and subsequently reincarnated. This physical resemblance suggests he may be a reincarnation or a descendant of that prince, and it positions him as a central figure in Lara's quest to find true love.

As a supporting character, Luca's role in the story is likely to be a key romantic interest or a catalyst for Lara's emotional journey. He is introduced alongside Mari Otsu, a high school boxer who takes Lara in, and the three characters are frequently depicted together in promotional visuals, indicating that Luca becomes part of Lara's new life on land. His relationship with Lara is presumably the most significant, as his connection to her past love drives much of the narrative tension.

Limited information is available about Luca's personality, motivations, or personal background. He is described simply as a young boy, and his interactions with Lara and the other characters have yet to be explored in depth, as the anime is scheduled to premiere in July 2026. Likewise, no special abilities or notable skills have been attributed to him. His primary importance lies in his visual link to Lara's tragic past and the potential he holds to help her achieve a happy ending.