Frederica is a figure from the past in the world of Saint Cecilia and Pastor Lawrence, introduced as a character whose tragic fate has had a lasting impact on others long after her death. She once lived in a large town to the west, where she was known and revered as the Saint of Compassion. Her existence serves as a poignant counterpoint to the life of the main character, Cecilia, highlighting the dangers and isolation that can accompany the status of being a saint.

At her core, Frederica was defined by her profound kindness and a genuine desire to bring comfort and healing to those around her. She was a gentle and altruistic soul, known for her sweet and caring demeanor. This warmth and sincerity left a deep impression on the people she encountered, particularly on the children of the influential Aldridge family, Hazelita and Gieselbert. Frederica was brought to the western town by a wealthy proprietor, where she quickly became a symbol of hope and solace for the local population. Despite being venerated, she was not treated as an ordinary person. Her guardian regarded her as property and exploited her gifts, isolating her from true human connection.

The circumstances of Frederica's life were marked by a cruel contradiction: while she was worshipped for her supposed divinity, she was denied basic human care in her time of need. She developed a secret, unrequited love for Gieselbert Aldridge, who, along with his sister Hazelita, deeply disapproved of her treatment and the way she was exploited by her wealthy keeper. Gieselbert made several desperate attempts to help her escape, but Frederica refused each time, fearing it would only bring trouble upon the Aldridge family. Her fate was sealed when she fell seriously ill. The townspeople, who had placed her on a pedestal, refused to believe that a saint could be vulnerable to a human sickness, and they denied her any medical treatment. Consequently, her condition worsened, and she was exploited until the very end of her life. Gieselbert eventually tried to expose the abuse by reporting it to the church, but this only led to his detention by her wealthy owner. By the time he was able to return to her, her illness had become incurable.

Frederica’s role in the story is not as an active participant but as a pivotal figure in the backstory that motivates several characters, particularly the Aldridge siblings. Her tragic death left a profound and lasting burden of guilt and regret on Hazelita and Gieselbert, which haunted them for many years. The emotional climax of this arc occurs when the current saint, Cecilia, uses her divine power to help the Aldridge siblings find closure. It is revealed through Cecilia that even after her death, Frederica continued to hold affection for them and had bestowed her protection upon them. This revelation brings them peace and a sense of redemption, allowing them to finally heal from the sorrow of her loss. In this way, Frederica's legacy is a major catalyst for the character development of Hazelita and Gieselbert, and her story serves as a crucial lesson about the humanity of saints. Unlike the current saint Cecilia, who is cared for and protected by the doting Pastor Lawrence, Frederica was isolated and ultimately destroyed by the worship that denied her mortality. Her story demonstrates the potential dangers of sainthood and underscores the importance of the loving, supportive relationship that Cecilia and Lawrence share. Information on any notable abilities beyond her role as a saint who brought comfort to others is not detailed, as her significance is defined more by her tragic personal history and its repercussions than by displays of miraculous power.