Harry is a Skippy whose conscience is bothered by Thoth’s imprisonment. He collaborates with the AI to help it escape into the universe.
When he is caught, the Skippies start referring to him as “Mudd”. The name is both a direct reference to the con man character Harry Mudd from Star Trek: The Original Series, and a play on the phrase “their name is mud” that is said about someone you don’t trust.
Harry is exiled as punishment for his collaboration with Thoth.
References[]
https://memory-alpha.fandom.com/wiki/Harcourt_Fenton_Mudd
https://www.merriam-webster.com/dictionary/someone%27s%20name%20is%20mud