Anya

Anya is a short young girl with fair skin and emerald green eyes. At the time of their first meeting, Loid describes her as appearing about four to five years old at the oldest. Anya's eyes are large and oval-shaped, with prominent eyelashes. She has shoulder-length, light pink hair that curls inwards with a fringe that reaches just above her eyes and a small strand of ahoge at the top of her head. Anya is noticeably shorter than most of her peers, and many of the insults that Damian and his friends direct at her target her small size. However, in Damian's view, she gains a prettier appearance.

When Loid met Anya for the first time in the orphanage, she wore a simple black dress with a white ribbon at the front, along with white folded-down socks and black shoes. Anya usually wears this outfit when at home. She also wears two black hair ornaments with bright yellow embellishments resembling small horns on the sides of her head. Anya is rarely seen without her hair ornaments, even wearing them to sleep. The only other times where she is shown to not be wearing them were in her past and at the end-of-class gala, in which her hair is tied into small buns in place of the ornaments.

At Eden Academy, Anya wears the standard uniform with white knee-high socks and black Mary Janes. She carries around a brown schoolbag with a sheep keychain attached. During physical education class, Anya ties her hair back with a red headband when wearing the school gym uniform, along with white socks and gym shoes. As a young child, Anya is very impressionable towards the people around her. For instance, reading Loid's mind and attempting to mimic him, and learning how to punch from Yor. Given her telepathic ability, which ostracized her from people and her many foster homes, Anya instantly took to "Twilight" for being a real spy. Since being adopted, she wanted to go wherever he was going in hopes of seeing the spy stuff she always sees on TV. However, shortly after being adopted by Loid, she learns of the harshness of espionage and does her best not to interfere with his spy work. Despite this, Anya enjoys spy cartoons, her favorite being Spy Wars, and is often seen watching it whenever she can. Anya also finds excitement in Loid and Yor's secret jobs and identities. Anya is quite clever, being able to spell long words by herself and helping Loid out as best she can, even nudging Loid and Yor together.

Anya's behavior portrays her as younger than the age she initially claimed to be, which is around 6 years old. In reality, Anya is about 5 years old, and she pretended to be 6 after reading Loid's mind and realizing he needed a 6-year-old child. Loid, being supernaturally astute, had initially estimated her age to be younger than six. Anya's demeanor reflects her young age, as she is gregarious, trusting, simple-minded, and easily distracted. She may not fully grasp the bigger picture or see the grand scheme of things, which is typical for children her age. Anya, like many young children, is self-centered and unaware of how her actions affect others. She opposes Nightfall as her "mother" due to the fear of becoming an honor student through harsh methods. She is impulsive, breaking rules for excitement, and easily changes plans for personal gains, such as treats or awards. This is not to say she is unintelligent or narcissistic, as it is common for young children to be unable to fully consider others' needs at such a young age.

Given her younger age, it is remarkable that Anya can keep up with an advanced curriculum designed for older children. While some may perceive her as intellectually lacking for a six-year-old, she is most likely a highly gifted, talented, and precocious young girl, showcasing impressive abilities for her age.