The sibilance used in the description of Scrooge suggests something sinister, akin to a snake, with a Biblical allusion to the snake in the Garden of Eden
Fred, Scrooge's nephew, persists in trying to include Scrooge in social activities, eventually leading to Scrooge's change and participation in a dinner party
Dickens also critiques capitalism through Scrooge's character, showing how capitalist ideologies can lead to isolation and a lack of empathy towards others