The procession is led by Imbri, the Immortal Knight, champion of Ulos, sitting astride her white horse. - Festival of Heroes (GS-ADV1)

The Immortal Knight during Queen Gimnax's rule of Nalos.

During the Festival of Heroes procession and fanfare, a Werewolf leaps into the parade and disrupts the celebration;

The Immortal Knight is thrown from her saddle when her horse rears, kicking its front legs wildly. Here you catch a better glimpse of the assailant — a Werewolf slashes the horse’s flank then barrels towards an old woman. - Festival of Heroes (GS-ADV1)

If overpowered by Arnon in his Werewolf form at the Temple of Shintal, you bear witness to him attacking Imri as well;

She pulls the beast off of you and the Werewolf slashes her face and neck with its claws. The knight staggers back as the wolf disappears into the shadows, his mother trailing after him.

Still bleeding, the knight gives chase, leaving only a broken Werewolf fang behind. You hope that she seeks out a healer. If her wounds are infected, she may soon share the Werewolf's curse. - Festival of Heroes (GS-ADV1)