"These materials are essential to the development of-- GAAAAAHHHH!! Get away!"
There are many things you can say about Gate's creations, but the one that best earns the title of 'coward' rests in Earthrock Trilobite. Made in part for the synthesis of crystals and gems that could later be sold, he makes up for his small body size with rock-solid armor meant to protect him from harm. He takes it a step further by fequently forming columns of crystals to hide behind. With all this protection in place, he likes to overestimate his own importance through grossly exaggerating what he's doing to friends, foes, and strangers alike. This is all a facade to hide a meek soul who has also inherited his creator's paranoia, one of which you can see faster if his armor were to be removed by a powerful pulling force. When cornered, he uses his aforementioned crystal columns for protection, but can also throw rebounding crystal spheres and even ram an opponent should he become so desperate.
Crystal Synthesis, Overdeveloped Sense Of Importance Until In Real Danger, More Than One Shell To Hide In, Paranoia, Not A Cockroach, Might Inherit The Earth Anyway, Brings The Shinies