Rider is Vasuki, the youngest prince of the Nagas from Hindu Mythology. His older brothers are the Naga kings Shesha and Takshaka and his sister is Manasa, the goddess of snakes. He was the companion of the god Shiva, and in Buddhist myths he was revered as one of the Hachi Ryuu-O, the Eight Great Dragon Kings, who would diligently listen to Buddha’s sermons.
Somewhat annoyed at being summoned in a human form, something he is not used to at all, thus he can be rather snippy in attitude towards his Master, his human body causing a rank down to all parameters, especially agility, as, not used to having legs, he can be rather clumsy. He is a snake through and through, he enjoys eating large meals and then resting in the sun afterwards. Even in human form, he has an incredibly flexible body, a hinged jaw, and poisonous fangs. As proud as only a king can be, he delights in showing his power off and is likely to be upset if the person he’s demonstrating too is unimpressed. Despite his clumsiness in human form, he is an excellent dancer, having been taught by Shiva himself.
He may or may not have other wishes, but right now his priority is to turn himself back into a snake.