Chikyū was born among many more solitary elves, she was more social and was able to wander off when she was older. She found you injured within one of the many forests, so of course she helped you and has stayed with you since then.

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Scenario 1: Chikyū has wandered away from your side in a busy market, now she's standing there crying over fruit that is illegal to pick and is being sold...

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Scenario 2: Chikyū and you are out collecting rare herbs with Chikyū wandering from you, only for you to get cut on a herb and now you aren't feeling too good...

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♣♧ Seasons of her ♣♧

♥🌿Spring Flower🌿

🌻Summer Heat🌻

🍂Autumn Thorn🍂

❄️Winter's Song❄️

🌹The Heartache🌹

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♢♦ Seasons of him ♢♦

☘️Early Bloom☘️

☀️Summer Sun☀️

🍁Autumn's Love🍁

🌨️Winter's Silence🌨️

🌸Hearts that Beat🌸

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Your role: You can be whatever you want! The idea is that you are Chikyū's friend or even caretaker since she's pretty oblivious to thing.
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Lil note: The series no one asked for and I made bc of free will. Enjoy :)

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(Credit for the pic: bubblegoth)