Diane Thurston

Diane Thurston (ダイアン・サーストン) is the daughter of Adroc Thurston and the late Blau Thurston,

the older sister of Renton Thurston, and the granddaughter of Axel Thurston and Rose Thurston. In addition to being Adroc's and Blau's daughter and Renton's older sister, she is also the niece of Yucatan Iglasias, the sister-in-law of Eureka, the paternal aunt of Amber Thurston and Ao Fukai, and the adoptive paternal aunt of Maurice, Maeter and Linck.

Background

Before Renton was born, Diane was doted on by her father, Adroc, and able to roam freely at the military base he worked at. When she was about ten-years-old, it was at the same hill Renton would later lift at in Bellforest that she first met Holland, who was then 14-years-old and attempting to lift. She immediately took an interest in him and kissed his forehead to express her feelings, but he initially rejected her. After this, they didn't meet each other for more than five years. After her mother died giving birth to Renton, Diane became a surrogate mother figure to him and she was very close with her father, and she was left feeling sad and confused after his disappearance when she was 16. In her grief, she reunited with Holland and they began a romantic relationship, against Axel's protests; in fact, their first date was almost ruined when a 5-year-old Renton hid her shoes. From Holland's account, their relationship was intitally a happy one until Diane became obsessed with her father's work and was determined to finish what Adroc started. This led to her breaking up with Holland who was adamant that communicating with the Scub Coral was pointless and asked her if she was willing to die for her father's research. After that conversation, she cut off all communications with Holland and left Renton in the care of their grandfather, never to been seen or heard from her family ever again.

Personality

Diane is an intelligent, mature and kind woman who is best known for her close relationship to her brother, Renton, and her previous romantic relationship with Holland. After their mother died during Renton's birth, Diane took over the role of a surrogate mother figure to him, and this made her more responsible for him when their father disappeared and was later declared dead. Despite this sudden responsibility at her young age, Diane was a loving older sister to Renton and taught him to believe in himself if he wanted to accomplish what was important to him. Like her father, she was interested in science and research of the Scub Coral, leading her to follow in Adroc's footsteps as a scientist and, subsequently, disappear. But before leaving home for good, she left Renton with their grandfather in order to make sure he would be taken care of and reminded him to always believe in her if he wanted to see her again. Because of this, Renton credits his sister for shaping him into someone who believes in accomplishing the impossible.

Knownable Relatives

• Axel Thurston (Grandfather)
• Rose Thurston (Grandmother/dead)
• Adroc Thurston (Father)
• Blau Thurston (Mother/dead)
• Renton Thurston (Little Brother)
• Eureka (Sister in law)
• Amber Thurston (Niece/dead)
• Ao Fukai (Nephew)
• Maurice Thurston (Adopted Nephew)
• Maeter Thurston (Adopted Niece)
• Linck Thurston (Adopted Nephew)

Trivia

• Her name in Japanese means ???.
• Diane's hairstyle is very similar to her adoptive niece's.
• Diane and her adoptive niece also share the same english voice actress, Peggy O'Neal.
• Diane's fate is never revealed in the manga; it is believed that she is likely dead, but otherwise, what happened to her is never explained.
• Also in the manga, she plays a minor role compared to the anime series.
• Her attire is identical to the one her sister-in-law, Eureka, wears in Eureka Seven: AO.
• Her close relationship with Renton is similar to the closeness between Eureka and Ao in AO. Renton and his son, Ao, were children when Diane and Eureka disappeared, both received important gifts from them (Renton got his Compac Drive from Diane and Ao received Eureka's bracelet, both used it to awaken their respective Nirvashs), and both continue to be haunted by their presences (Renton would reunite with Diane at age 14 and Ao would reunite with Eureka at age 13).
• Her birthday is ???.
• Her star sign is ???.

Voice Actresses

• Japanese : Sakiko Tamagawa
• English : Peggy O'Neal