Strange hyperactive mutants from a highly radioactive planet. Foogoblah are so aptly named as it's a very common sound from their native language, which apparently includes elements of dance, gesture, smell, and taste in addition to sound. Most offworlders find this language very difficult to learn.
Lenna Morrisson was the screw-up kid sister of a promising young scientist. Armed with an experimental growth suit stolen from her older sister's laboratory, she hires herself out as rented muscle to gangs, syndicates, and supervillans of all kinds.
Scorned and humiliated as a child for his extreme birth deformity, the young Charlie Cronch developed a psychopathic disdain for the wellbeing of other people. He eventually found his place in the criminal underworld, as a highly paid strong arm henchman. He comes well prepared.
Slug Bats are strange aberrations of nature. They have characteristics of bats, mollusks, and primates, but fit nowhere in the established evolutionary taxonomy. Some of the stranger theories include that they are aliens, or are otherwise somehow artificial.