Colonel Juanitos was an officer in the San Theodoran military under the administration of General Alcazar.
History
Juanitos is portrayed as a very loyal and competent officer unlike most of the others in the San Theodoran army. It was he who placed Tintin under arrest by order of Alcazar after he was framed for treason by R.W. Trickler. Despite this Tintin, also a Colonel in the San Theodoran army, seemed to be on good relations with Juanitos.