The game is the fourth entry in the Luminous Arc series, and the first in the series not developed by Imageepoch, who suffered financial troubles around the time of the game's development, ultimately leading to a 2015 bankruptcy filing.

[4] The game features multiple endings, based on the player's actions, each one being drastically different from the other.

[5] Seed (シード, Shīdo) A young keytone specialist from the floating city Floatie.

It's hard to see his motivation, and he doesn't show his true feelings to someone else, though his sense of justice is unusually strong.

During childhood, his birthplace Floating Castle Fonrex was destroyed, and he was saved and taken to Floatier.

Aqua (アクア, Akua) Seed's foster little sister, a keytone specialist assistant.

Very devoted to invention, she won't care about surrounding troubles in order to get the things she is interested in.

Feilang (フェイラン, Feiran) A girl from the Oni clan, hailing from Tao.

Rana (ラナ) A girl living in the Morocca (モロッカ, Morokka) Republic.

All three entries were developed by Imageepoch, published by Marvelous Entertainment, and released between 2007 and 2009 on the Nintendo DS handheld video game platform.