Final answer:
In Albert Camus' 'The Plague', Othon is the character who is NOT involved in helping Rambert to escape illegally. While 'our friend', Garcia, and Raoul are accomplices in the scheme, Othon stands apart as he is not part of the escape plan.
Step-by-step explanation:
The character who is NOT participating in helping Rambert to escape illegally in Albert Camus' novel The Plague is Othon. While the characters 'our friend', Garcia, and Raoul are all involved in the plans for Rambert's escape attempt, Othon is not part of this group and does not assist in the illegal escape effort. 'Our friend' is known for his distinctive horse-like face and his passion for football, Garcia is part of the escape network, and Raoul is the smuggler who facilitates illegal escapes from the quarantined city, but it is Othon who does not play any role in these activities.