Mayu Oyama

Mayu Oyama is the daughter of Tochiro Oyama and Emeraldas. With her parents either dead or unable to raise her, Mayu lives on Earth in various areas, ranging from a Christian boarding school to a secret area in Egypt. She often serves as the reason Captain Harlock protects Earth aside from Tochiro's love of the planet.

Appearance
Mayu is often seen as 7 year old girl with light blue hair, brown eyes with lashes, and has the standard face pattern of female characters of the Leijiverse. She is often dressed in a white shirt with a turtleneck collar, a red overall dress that features a green bow on the front, black Mary Jane shoes, and white socks.

Physiology
It turns out that Mayu is actually a Human-La Metalian hybrid. It remains completely unknown if Mayu Oyama herself is at all fully aware of her being a child born from two different planets (Earth and La Metalian), with her DNA being 1/2 Human and 1/2 La Metalian coming directly from her biological Mother (being Pirate Queen Emeraldas) and Father (being Tochiro Oyama) respectfully.

Personality
Much like her father, Mayu tries to live to the best she possibly can in spite of all the bad things that happen in her life including not having her parents around, the bullying she receives from her classmates, and the dangers including the Mazon. Her optimism and enthusiasm about life had influenced people close to her, including her guardian, Captain Harlock.

Family
Mayu has not had much contact with her parents due to her father Tochiro's death and her mother Emeraldas always away. She has not had much contact with her other family including her aunt Maetel, often only receiving mentions or gifts from them.

Harlock
Harlock is a family friend of Mayu's parents. She receives occasional visits from him, often on her birthday. Mayu treasures the ocarina she had received from Harlock on her 7th birthday, keeping it as a personal connection between them. Even when Mayu herself was captured and held prisoner by the Mazon, Captain Harlock and his entire crew vowed to journey to the ends of the universe to find Mayu, rescue her, and to safely return her home.

Trivia

 * In the drafts, Mayu's name was going to be Tamiko Oyama until Matsumoto pitched in her current name.
 * Mayu's song on her ocarina, dubbed "Mayu's Theme", is considered one of the representative songs in the anime.