He is Juan Crisostomo Ibarra of Noli Me Tangere in disguise.
He fled to Cuba where he became rich and consequently befriended many Spanish officials.
Unlike Ibarra in Noli, he is now vigilant; he now embodies the Filipinos who had had enough of the cruelties of the Spaniards.
Outwardly, he is a friend of Spain, but deep in his heart, he is bitter and ruthless, secretly planning a revolution against the Spanish authorities.