Also known as: グレン
A character from the Transformers Science Fiction franchise.
Hook is an evil Constructicon Decepticon, a sentient green, grey and black Alien Robot that can transform into a bright green Nissan Diesel Unic K-160B Truck Crane.
His name in Japan was changed to Gren (Guren).
Motto: "Strive for perfection... Even if others must suffer!!!...".