Kotaro Maeda, more commonly known by his username Deino, is a 3DCG artist, animator and PV producer known by his disturbing and menacing, yet interesting style. His user name comes from the Greek word δεινός, which means 'terrible,' reflecting very well his art style, which often is labelled as "Nightmare Fuel."
He is the creator of Calcium, and her Hatsune Miku variation Calne Ca. Her character has been officially recognized by Crypton, and she appears in Project DIVA in some of the skins illustrated by Deino.
Deino, along with several other illustrators, is one of the skin designers for the game "-Project DIVA- Arcade".