Conversation so far:
What was Mohanlal's famous stage performances?
In 2001, he debuted in professional drama playing Karna in Karnabharam, a Sanskrit-language play directed by Kavalam Narayana Panicker.
What was Mohanlal's next stage performance after Karnabharam?
Kadhayattam was a presentation enacted by Mohanlal, performing ten classic characters and situations from Malayalam literature.
What was Mohanlal's best acting performance?
In 1991, Mohanlal produced and starred in Bharatham. The film was a critical and commercial success, and got Mohanlal the National Film Award for Best Actor for that year.
What is Chayamukhi?
Chayamukhi was a 2008 stage play written and directed by Prasanth Narayanan.

Question: what was his role in these performances?
Self-contained rewrite: What was Mohanlal's role in Prasanth Narayanan's Chayamukhi?