This review is based on my personal opinion. It is in no way meant to offend anyone. आप are free to agree या disagree with it.
Yuuma (or Yuma) is an official Vocaloid developed and distributed द्वारा Bplats, Inc. His voice provider is unrevealed. VY2 is an abbreviation for "Vocaloid Yamaha 2." His item is the Wakizashi and he is avatar-less, although many concepts have been thought up for him, especially the one in the picture.
His voice is amazing. It's not too deep, like Kaito's voice. It works with almost any song and is compatible with a lot of the other Vocaloids. I feel like he's under-appreciated sometimes but I think that's just because he's not as लोकप्रिय as the older वोकलॉड्स that have been around longer.
Some songs that I think really showcase his amazing voice are link
featuring VY1 Mizki.
I do not own this Vocaloid या anything of the sort and probably never will so I can't review what I think of the product itself.