Mercer was the only Cobra Viper that ever defected to G.I. Joe and lived. He escaped from Cobra Island by hot-wiring a hydrofoil and outrunning his pursuers across the Gulf of Mexico. Although reformed, Mercer must prove his new loyalty constantly, since not all of the Joes trust him yet.

noun

British - a dealer in textiles; dry goods merchant

adjective

1. working or done for payment only; motivated by a desire for money or other gain; venal; greedy
2. designating a soldier serving for pay in a foreign army

Cobra
G.I. Joe
Viper