Jodo Kast was an Alliance SpecOps member who deserted to become a bounty hunter. He wore a suit of armor similar to Boba Fett, and sometimes even impersonated the famous bounty hunter. Kast was killed by Boba Fett who set a trap for him in order to find out who was impersonating him. Angry at discovering that Kast was "no one", Fett paralyzed him and left him to be killed by his own overloading jetpack.
Jodo Kast was created as an analogue for Boba Fett so he could be used where the situation called for someone like Boba Fett, but weaker. He features heavily in some Star Wars roleplaying books and is an unlockable character in Masters of Teras Kasi.