Yara Cos

Yara Cos was a girl who loved to sing and lived in a village with her older sister.

Biography
Throughout her youth, she was thoroughly told not to sing by her grandfather for a reason unknown to her, though it was later discovered that she was able to perform magic by singing. When her ability was discovered by a band of mercenaries, her sister and fellow villagers were murdered in cold blood in an attempt to find her whereabouts, forcing Yara to run away.

It was then she began her quest, seeking to find the Diamond Castle hidden in the Glistening Grove, which would lead her to find Caellana Forest, which would ultimately reveal the Tree of Life, which was said to bring back life that was wrongfully ended; she aimed to bring her village back.

Along the way, she met Ayden Jaubert who, she discovered, possessed the same powers as her, and just so happened to be looking for the Diamond Castle as well; she aimed to find the Eternal Fountain and drink from it to cure herself of the Horde infection she had, and hopefully the impure immortality she possessed.

When they'd made to the Caellana Forest, the two were apprehended by a pair of bandits who wished to drink from the Tree to earn immortality. In an attempt to save Ayden from being stabbed by a cursed dagger, Yara sacrificed herself, ending on the receiving end that would ultimately kill her, for her being a human made her too weak to endure the resulting curse.

In honor of her memory, Ayden spends the following years rebuilding the village Yara had told her she'd come from, and coming back to Caellana Forest every century on that same day of her death to sing to the memory of the deceased girl. Ultimately, Ayden ends up naming her closest friend and A.I. after the girl who is allegedly reincarnated in Rebecka Barnes.