Juna is a girl in the tenth grade, who is chosen by Chris to be the "Avatar of Time", to save the planet. Besides possessing powers due to her "Earth sympathy", she is an ordinary teenage girl. She has a difficult time understanding her purpose, and is unsure how she is supposed to help the planet. Her personal life is also distressed, both with her mother and sister, and especially in her uncertain relationship with Tokio, whose thoughts she cannot figure out, and who similarly never manages to understand her feelings. While she attempts to succeed in her job, she cannot understand the message Chris is trying to explain until the very end, when she realizes the meaning of "becoming one with the target" that she repeats from the beginning of the series. 

Juna was just an ordinary high-school girl, right up until the day she died in a motorcycle accident. But there, in the twilight of death, she saw the future of the barren earth destroyed by the Raaja, and was offered a second chance at life if she would stop them. Now she must learn to cast aside her thoughtlessly destructive ways and face her destiny as the Avatar of Time, the one being who can decide the fate of the planet.
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(Source: Anime News Network)

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Mami Higashiyama is a Japanese actress and singer, best known for her role as MegaPink/Miku Imamura in Denji Sentai Megaranger. She is affiliated with Sun Music Brain talent agency.

Juna Ariyoshi