KAZUMA

The Story of Kazuma / Kaser in Lost Soul Aside
The Beginning: Resistance and Tragedy
Kazuma and his younger sister, Louisa, are orphaned during a great war between the Celestrian Empire and the Kingdom of Frosthold. They both join GLIMMER, a resistance group whose goal is to overthrow the Empire's tyranny.
The story actually begins during a GLIMMER operation in the imperial capital, intended to inspire a popular uprising. However, her plan is violently interrupted.
The Invasion and the Bond with Sand
During GLIMMER's attack, a catastrophic event occurs: a mysterious meteor shower falls on the city. This isn't a natural phenomenon, but the arrival of the Voidrax, dimensional invaders whose goal is to drain humanity's souls.
In the midst of devastation:
Kazuma is sent underground (or to a hidden area).
There he encounters a mysterious dragon creature named Sand, who grants him fantastic powers and becomes his symbiotic companion.
Kazuma rushes to find Louisa, but witnesses his sister's soul being drained by one of the Voidrax.
The Heroic Mission
This event marks a turning point. With his sister's soul lost and a newfound extraordinary power, Kazuma embarks on a dangerous odyssey with the ultimate goal of:
Save Louisa and get her soul back.
Free humanity from the threat of the Voidrax.
His journey takes him through various dimensions and worlds, facing countless enemies and colossal bosses, as he learns to master his new abilities granted by Arena. In essence, he becomes the hero who must save not only his family, but all of civilization.