Astea is a character from the anime Hero Without a Class: Who Even Needs Skills!. She is the older sister of the protagonist, Arel, who is also referred to as Allele in some sources. In terms of appearance, Astea has light brown hair that flips up at the ends, a trait she shares with her mother, Fara. She is notably petite and small in stature, and she was surpassed in height by her younger brother when he was ten years old.

Her personality is defined by a deep and devoted affection for her brother. Astea is extremely attached to Arel, and her feelings are so strong that she reportedly aims to marry him. Her speech pattern is distinctive, as she has a habit of adding an emphatic expression to the end of her sentences. She is a caring and worried sister, frequently expressing concern for Arel's well-being. She has been shown to worry when he stays out late and when he comes home injured, showing a protective and anxious side to her nature.

Astea’s primary motivation stems from her love for her brother. She expresses a genuine desire to create a kinder world for Arel, indicating that his happiness and safety are central to her goals. In the early part of the story, she plays the role of a supportive family member. While others might doubt Arel for not having a class, Astea is shown to believe in him, commenting that his lack of a class has not slowed him down and that he is thriving regardless. She also makes reference to their mother, mentioning that she used to work at a certain place a long time ago.

Her key relationship is unquestionably with her brother, Arel. The narrative frames her character largely through her interactions with and feelings about him. Information regarding her role in the larger story, her personal development throughout the series, and any notable combat abilities she might possess is not available in the provided information.