Chitto is a young boy who resides in the same orphanage as the main female character, Helga, where he becomes her closest and most steadfast friend. He appears to be somewhat younger than Helga and is characterized as a good-hearted, earnest, and active child. While he possesses the playful and occasionally mischievous nature typical of a boy his age, his defining trait is his unwavering loyalty and dedication to Helga. He is deeply motivated by a desire to help her, specifically in her quest to find a mysterious place that she continually envisions and draws. This strong sense of friendship is what leads him to join Helga in her initial escape from their orphanage, setting the series' plot in motion.

In the story, Chitto acts as a key supporting character and intermediary, often caught between the introverted Helga and the more impulsive protagonist, Tohma. He sometimes tries to assert his importance as Helga's friend and may even show a competitive or confrontational side when dealing with Tohma. However, his fundamental role remains that of a reliable and helpful companion to both of them as their journey progresses. His most significant relationship is unquestionably with Helga, whom he supports without reservation. He also forms a friendship with Tohma, and the three become closely associated during their adventures.

Regarding his development within the narrative, Chitto is a major character primarily in the first half of the series. As the story progresses and its central mysteries deepen, he tends to fade into the background, becoming less prominent and having fewer lines. A notable aspect of his character is his origin; unlike many of the other key figures in the series, he is not connected to the reincarnation cycle central to the plot. He is simply a human boy from Earth with no past life on the distant planet of Greecia. In the end, he does not appear in the story's epilogue or its extended special ending. Chitto does not possess any supernatural or notable abilities; his value to the story comes entirely from his courage, his loyalty, and his role as a normal child caught up in extraordinary circumstances.