Helga is the female protagonist of the story, an eleven-year-old orphan living on Earth in the year 2001. She resides in an orphanage where she endures increasingly severe mistreatment, prompting her to plan an escape with a boy named Chitto, the only friend she has there. Her primary motivation for leaving is a deeply ingrained, mysterious urge to find a beautiful, unknown landscape that appears in her memory, a scene she constantly tries to capture in her drawings.

In terms of personality, Helga is consistently portrayed as reserved, introverted, and quiet, often maintaining a serious or straight-faced expression. Despite her withdrawn nature, she possesses a strong sense of empathy and is very understanding towards people who are suffering from sadness, showing that she cares deeply about the well-being of others around her. Her bravery and selflessness become evident when she risks her safety for the sake of her friend Chitto, an act that profoundly affects another protagonist, a boy named Tohma. Initially, Tohma misunderstands her quiet demeanor, but her courageous actions later become a pivotal moment in their relationship.

Helga’s role in the story is intrinsically tied to a grand mystery involving a group of enigmatic, white-haired children who have wandered Europe for over five centuries. It is eventually revealed that Helga is not an ordinary girl; she is the third reincarnation on Earth of a girl named Tina, a princess from the distant planet of Greecia. Her compulsion to draw the foreign landscape is a subconscious remnant of her former life on that world. The key relationships in her life are shaped by this past. She is deeply connected to Tohma, who is later revealed to be the reincarnation of a boy named Sess from Greecia who had complex feelings for Tina. Another figure from her past is Soran, the person Tina loved and promised to meet again on Earth. Helga’s other vital relationship is with Chitto, her loyal companion from the orphanage who believes in her and helps her escape. As the series progresses, Helga’s development focuses on the gradual recovery of her past identity. She regains Tina’s memories and feelings, which come into conflict with her current life as Helga. At a climactic point when her full memories return, she undergoes a physical transformation, taking on the appearance of a person from Greecia, marked by her hair turning white and her eye color changing to blue. This transformation forces her to make a profound decision about her own future and identity, reconciling the soul of a princess with the heart of a girl from Earth.

Helga’s most notable ability is her unconscious compulsion to draw, which serves as a psychic link to her past life. Her drawings of the unknown Greecian landscape are the original clues that drive the search for her identity. Furthermore, as the reincarnation of Tina, she is inherently tied to a massive, immeasurable power that was created when the princess’s soul fused with a transmigration device, turning her into a potential ultimate weapon. However, Helga herself does not actively wield this power; instead, her soul is the subject of a centuries-long search by the Befort Children, who were the Greecian scientists tasked with finding her on Earth. At the end of her journey, having resolved the conflicts of her past lives, Helga chooses to live her current life to the fullest, eventually building a small daycare center by the sea where she lives happily with the children in her care.