This is just a sudden idea that popped into my head.
Songs come from the heart. Singers sing as they please, while listeners may find enlightenment or lose themselves in the music.
Long ago, the Ji clan was renowned for song. There were battle maidens who stirred the soul and transformed things through song, and holy maidens who healed people through song, sustaining life without end. Alas, times changed, and people eventually forgot the Ji clan ever existed. The clan gradually withdrew from the world and stopped involving itself in worldly affairs...
Ji Yu was the founder of the Ji clan. Even after her death, her descendants used a secret technique to preserve her appearance, and she was sealed in ice within the clan.
Then one day (yes, it really was that sudden), nine stars aligned, time and space fell into chaos, and Ji Yu was sucked into a black hole. The universe granted her a new life, and she fell into the ocean...
Ji Yu had no idea how she woke up. All she knew was that a green giant named Hulk was beside her, and the universe had also gifted her a Soul Stone around her neck.
Later, Ji Yu fell asleep again. She needed to fully merge with the Soul Stone, so she told Hulk to go out and have fun, promising she'd find him when she woke up.
But when she woke, the world had changed.
Ji Yu stared at the black hole in the sky, utterly baffled. So... aliens were invading?
There was no helping it. Ji Yu couldn't just watch people get attacked, so she joined the fight without hesitation.
From then on, whenever war broke out, her beautiful singing would reach people's ears, comforting the panicked crowds, or reach the enemy, bringing them grim tidings of darkness.
Everyone called her the Songstress.
I'll decide on the CP later. Anyway, the female lead has all kinds of auras and is powerful in every way. If you don't like it, don't read. Bleh!