Sir Pentious is an antagonist, an inventor, and a snake demon in Hazbin Hotel. He is Cherri's arch-rival, with both of them constantly locked in turf wars over new territory after exterminations. 

Sir Pentious is bombastic, flamboyant, and persistent, having the personality one would expect from an old school 60s villains. He takes pride in how evil he is, at one point he said: "I'm so evil".

As noted by Angel Dust, Sir Pentious really doesn't get sexual innuendos. This can be due to the fact he's from the late 19th century when sexual innuendos and sex jokes weren't really a thing.

Keep it like the show.