why are they named Green Juice?

heheeg i honestly dont know ive just always liked the word juice, it feels like a fitting word to describe abstraction or like the essense of things, since juice is often an extract/simplification of a fruit. and they have a green magic orb thing on their horn and tail that is a sort of abstract kinda mental magic so idk,,,, green bcs the magic orb, juice because abstraction and also sounds silly :>