Slippery Dick
Slippery Dick, also known as Slupo and, formerly, Dix, is an advanced bullywug that was born a changeling hundreds of years in the past. At some point, he sold his soul to the devil, and as a result was condemned to burn in hellfire for eternity. He was offered a reprieve from this, however, and reincarnated as a bullywug in return for performing a service on behalf of Lilos. Namely, his job is to travel with Saturday Stronghoe until he finds an opportunity to persuade them to sell their soul to hell.
Slippery Dick is notably cruel and sadistic, and likes nothing more than causing extreme suffering to those around him. He is also an expert at disguise and deception, and is pumped as a result of hardcore physical training since being a tadpole. His pact with hell grants him various mysterious powers, which he passes off as wizardry. To this end, he wears the hat and robe of a wizard that he slaughtered during his bullywug youth. Among his powers is an absolute immunity to any magic that would compel him to reveal his mission or affiliation with hell, including his alignment.
