Princess Amelia "Mia" Mignonetta Grimaldi Thermopolis Renaldo
Her grey eyes are her "only attractive feature", according to her outspoken best friend Lilly Moscovitz.
Amelia struggles with her new role in the world as Princess of Genovia (a country loosely based on Andorra). For all of her childhood and a some of her adolescence, she prefers to wear combat boots and overalls (though she wears a uniform to school) instead of the designer wardrobe that is expected for her. She is fluent in English and is learning Spanish and French, though she sometimes humorously mistakes homonymous words for one another.
Mia often does inappropriate or mortifying things, particularly when she is in ...view middle of the document...
She finds a new producer in Tina Hakim Baba, who receives an allowance of fifty dollars per week.
She goes out with Boris Pelkowski, but dumps him in the fifth novel after meeting Jangbu, an attractive Tibetan sherpa; by the time she regrets the breakup, Boris has already moved on with Tina. Lilly later falls in love with John Paul "J.P." Reynolds-Abernathy IV and goes out with him for roughly six months until he breaks up with her, blaming the way that Lilly treats people - particularly Mia. However, J.P. actually broke up with her because he was falling in love with Mia, which leads to an estrangement between the two girls.
Lilly goes on to create the website ihatemiathermopolis.com, dedicated to criticizing Mia to the point of general abuse. By the end of the ninth installment of the series, they seem irrevocably estranged, but the reason for Lilly's coldness towards Mia is revealed in the last novel, Forever Princess, and they resume their friendship.
 Michael Moscovitz
Lilly's older brother, Michael, is the love of Mia's life. Like Lilly, he is highly intelligent and academic; unlike her, Michael is much more socially adept, very perceptive, and "wise beyond his years", as well as the most normal and stable member of his neurotic family. He is a fan of Buffy the Vampire Slayer, Xena: Warrior Princess, and Star Wars. He begins the series as a senior at Albert Einstein High School, where he is the treasurer of the computer club and co-valedictorian. Before dating Mia, Michael has a crush on her and is very irritated when Mia appears to like other boys. In the first book Mia dresses up to go to her grandmothers and Michael mistakenly thinks she is going on a date. On several occasions he attempts to ask her out, but is always interrupted. Later when Mia starts to date Kenny, Michael is secretly crushed which leads him to spend time with Judith Gershner.
Mia has a long-standing crush on Michael and likes the "smell of his neck", as well as his "surprisingly" well-defined chest. In Princess in Love, the night before Mia leaves to spend Christmas in Genovia, they confess their love to one another at the Non-Denominational Winter Dance and become a romantic couple. Michael gives her a snowflake necklace as a birthday present in Princess in Pink which she treasures as a symbol of their relationship.
In book eight, just before he flies to Japan for a year, Mia flings the snowflake necklace back at him and they break up because of his "dishonesty" about his past relationship with Judith Gershner. Michael invents a robotic arm prototype which a Japanese company hopes to develop for open heart surgery, an invention he later reveals was spurred by his desire to prove he was "worthy of dating a princess."
In the ninth book, Mia tells her psychologist, Dr. Knutz, about her feelings of inferiority to Michael, whom she expected to dump her for someone better; the "dishonesty" about Judith had been an excuse to dump him first. She...