Passage: Living in the sewers and waging a one-man war against organized crime, his only friend is an old alcoholic named Shake, a former stage actor who speaks in rhyme for reasons unexplained. Now legally declared dead, Castle strikes back from beyond the grave, killing mobsters wherever he can find them. Due to his war against them, the Mafia families have weakened, forcing one of the family leaders, Gianni Franco, to come out of retirement.

Question: Who is the alcoholic?
Shake