These three brothers, often referred to as the Orso Brothers, all own the same beyblade with only slight variations of colours and work for Dark Nebula. The one who seems older, Kumasuke, appeared at the Battle Bladers Challenge Match to show his talent in beyblading. Together though, they complete each other in their brutality and do not hesitate to stamp on the opponent with all their strength. They generally look quite 'lumberman-like', and they are obviously very stubborn. As brothers, also, they do get angry at each other for simple things like losing.
- Their names are basically full of 'kuma', which is Japanese for 'bear'.