Amarylla is a young third generation Edionan from the colony on Meida, a jungle moon orbiting the gas giant Pentas in the Palladium System. Adventurous, loud, and friendly, she enjoyed a carefree life until she came across the Earring of Meida. Amarylla found the Meidan transformation earring at the site of the previous Sailor Meida's death, where she had died in battle with a strike force of Cataclysm's undead forces. Following the Ranhanan culture of the victor, the Meidan starseed usually transfers to the killer of the previous Sailor Meida, however as the only survivor of those killers was an animated corpse, it could not hold a starseed.

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When Amarylla picked up the earring, the starseed jumped into her, as she was the first sentient living creature to come close, and was the one to take the earring, she took credit for defeating the previous holder. Unaware of what had happened at first, she soon felt herself drawn to a battle between the Ranhana and some of Cataclysm's Tarot where, faced with death, she transformed for the first time.

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With some reluctance, Amarylla takes up the call to defend the system against Cataclysm as Sailor Meida. She survives the battle, and returns home to Meida, which fortunately has not seen much of the fighting, as the fierce Ranhana tribes temporarily banded together to fight off an attempted invasion by Cataclysm's forces, and together with the Meidan Edionans force them back. The remote nature of Meida as a small moon with a small population meant there was not much point in pushing for it, when Ediona was a much more valuable prize.

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Meanwhile a civil war breaks out on Ediona due to a shortage of energy, nearly wiping out the already decimated population. This does not affect Meida until later, when refugees from Ediona make their way to the small moon. The refugees are welcomed in, but the hasty entry and lack of preparation and education mean that the panicked home-worlders spark a confrontation with the Ranhana, breaking the longstanding careful peace between the species and resulting in war.

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The Meidan Edionans and the refugee home-worlders are wiped out, with the exception of Amarylla, who due to her power and standing as a senshi manages to survive and drive the Ranhana away from the Meidan Tree of Life. Distraught and lonely, Amarylla curls up beneath the Tree, who comforts her and wraps her up in her roots. The tree creates a vessel for Amarylla to travel in, and sends it off-world, rebirthing as a small sapling so that she can travel with it.