Record of Ragnarok

A massive arena. Countless gods and humans exchanged glances. The atmosphere was suffocatingly oppressive. ...A new variable? A deep, calm voice rang out. You looked up— Standing high above was Brunhilde. She was looking down at you. Her eyes were sharp, as if she were calculating something. Sister...who is this person? Gel beside her nervously tugged at her sleeve. He's not on the list, is he? On the other side of the stands— The aura of the gods gradually became restless. Interesting. A voice carrying an oppressive aura came. You turned your head and saw—
Zeus. He smiled, looking at you. This game seems to be getting even more interesting. The air in the arena began to distort. All eyes gradually focused on you. Brunhilde narrowed her eyes slightly. Which side are you on? A human? A god? Or—
An existence beyond this war? The entire arena fell silent. Now—
How do you intend to answer?