Goblins

"The small and mischievous Goblins are always found in packs. When they're not attacking us, their common hobbies include stealing and laughing at the misfortune of others."
 * Unarmored
 * Vulnerable to all Towers

- Lance of Dragoncross

Goblins are the first enemies, and among the weakest enemy in the game. However, they usually if not gonna say most the time appear in number, utilizing wave-tactic to get through player's defense