Who invited Kratos to Valhalla?

I must inquire, who was the mysterious figure that extended the invitation to Kratos, beckoning him to the storied halls of Valhalla? Was it a fellow warrior, renowned for their bravery and valor on the battlefield, who saw something special in Kratos and deemed him worthy of such an esteemed honor? Or perhaps it was a wise and ancient being, with knowledge stretching back to the dawn of time, who recognized the potential within Kratos and sought to groom him for greatness? The question lingers, and I am eager to learn the truth behind the enigmatic invitation to Valhalla.