Ker and Beus (called Keru and Besu in the English dub) are Ken Midori's two canine puppets that he uses to communicate with due to his shy personality. They first appeared in epsisode 2 of Beyblade Burst. Their names are a reference to the name of Ken's Beyblade, King Kerbeus, each of them having one of the syllables as its name. Ker and Besu each represent a different side of Ken's character.
Appearance
Keru
Keru is the blue puppet and has pointed ears & teeth and an overall aggressive expression. He represents Ken's stronger, more passionate side. Ken often uses Keru whenever he wants to say something rude or make snarky comebacks. He also usually holds his bey, Kerbeus in Keru's mouth.
Besu
Besu is the brown puppet and has floppy ears, square-shaped teeth, crossed eyes, and a more goofy expression. He represents Ken's friendlier and gentler side. Ken uses Besu to show his sense of humor and to cheer others up when they feel down.