Isabella is a character who appears in the anime Sorcerous Stabber Orphen -Doom of Dragon's Sanctuary-. She is a member of the Thirteen Apostles, which is a notable organization within the series' narrative structure. Her primary affiliation within this group is as a disciple of Maria, another member of the Thirteen Apostles, establishing her place in a hierarchical relationship with a more senior figure.

In terms of her personal attributes, Isabella has been described by her Japanese voice actress as a character who embodies the qualities of a smart and strong older sister. This description provides insight into her likely demeanor and bearing within the story, suggesting a personality that is both intelligent and capable, as well as protective or mature in her interactions with others. The voice actress has also indicated a particular focus on Isabella's relationship with magic, implying that her abilities or her perspective on sorcery are a key aspect of her character to observe throughout the series.

Isabella's role in the plot is tied to her introduction in the latter part of the series, specifically appearing during the Sanctuary Arc. She makes her first appearance in the eighth episode of this arc, marking her entry into the ongoing events of the story. Her motivations are not explicitly detailed in public sources, but as a member of the Thirteen Apostles and a disciple of Maria, her actions are likely driven by the goals and directives of her organization and her master. Her key relationship is therefore with Maria, who serves as her direct mentor and superior within the group. Information on her development throughout the series and a detailed list of her notable abilities is not available from the provided search results.