Pablo is a hired assassin in San Theodoros.
He was originally sent to assassinate Tintin in The Broken Ear after being paid $5,000 by R.W. Trickler's right hand man Rodriguez, but Pablo ends up saving the reporter’s life from another assassination attempt by Ramon Bada.
Later on, in Tintin and the Picaros, Pablo double crosses General Alcazar, Tintin and his friends while working for General Tapioca. He seems to lie to them, and apparently almost gets them killed on the road to Alcazar's camp. Luckily, they were saved by a monkey (to Pablo's ears, they were killed). Alcazar and Haddock believe Pablo truly betrayed all of them, but Tintin pointed out that Pablo actually helped them; because of his actions, Colonel Sponsz believes Tintin and his friends to be dead, and this leaves them free to come up with their own plan to rescue Castafiore and the Thompson twins.