Ludo Chevalier acts as the trusted animal companion to Shinonome Hangetsu, the Dog Knight, within their shared narrative. Hangetsu addresses him by the nickname "Noko," a moniker inherited from a cherished childhood dog—a label Ludo resents. Tasked with aiding Hangetsu in combat against formidable golems and the larger struggle surrounding the enigmatic Biscuit Hammer, Ludo proves vital to their cause. Unlike fellow companions who fall before the story’s climax, he endures until the final battle’s conclusion. Their relationship, characterized by steadfast loyalty tempered by occasional friction, centers on clashes over the disliked nickname.