No biographical details are currently known.
I had already been collecting images of some dwarf actors when I identified him and was able to add 2 roles to his filmography, so there are very likely more to find. He has a second IMDb page containing 2 listings under the name Enrique Fernandez "Sonio", and it seems "Sonio" was a nickname he went under. Unfortunately several of his credited movie roles look to be hard to find. IMDb lists several films shot in Mexico in his filmography, but these must almost certainly be a different actor of the same name.
- Il mercenario .... Circus dwarf (uncredited)
- Peer Gynt (TV movie) .... Dwarf (credited)
1970 - El bosque del lobo .... Drunken dwarf in the tavern (uncredited)
- L'inafferrabile invincibile Mr. Invisibile .... Restaurant customer (uncredited)
1971 - Crónicas de un pueblo (TV series) Eps.: "La pirueta, parts 1 & 2" .... Cachivache (credited)
- Le calde notti di Don Giovanni .... Party guest (uncredited)
1973 - Corazón solitario .... The Practitioner's partner (uncredited)
- La llamaban La Madrina .... One of Trini's pupils (uncredited)
1974 - Una pareja... distinta .... "Dwarf No.1" (credited)
1975 - Cuentos y leyendas (TV series) Ep.: "Don Yllán, el mágico de Toledo" .... Homunculus (credited)
- Cuentos y leyendas (TV series) Ep.: "El regreso de Edelmiro" .... Friend of Tartanero (credited)
1976 - Cuando los maridos se iban a la guerra .... Jester (credited as "Sonio")
- El segundo poder .... Tineslao (credited)
- Tiempos duros para Drácula .... Contact collecting the case (uncredited)
1977 - Caperucita y Roja .... The Mayor (credited as "Enrique Fernandez (Sonio)")
- Ésta que lo es… .... Member of circus troupe (uncredited)
- Eva, limpia como los chorros del oro .... Brothel client (uncredited)
- Gulliver .... role unknown (shown on poster - credited unknown)
- La ragazza dal pigiama giallo .... Laundry owner (uncredited)
1979 - La mansión de los Plaff (TV series) 5 episodes confirmed .... Patuchas (credited)
1980 - La mansión de los Plaff (TV series) 1 episode confirmed .... Patuchas (credited)
1981 - La mansión de los Plaff (TV series) 2 episodes confirmed .... Patuchas (credited)
- La masajista vocacional .... Hospital director (credited as "Enrique Fernandez (Sonio)")
- Cover Girl (1968) IMDb
- El castigo de la miseria (1972 TV episode or movie) IMDb. This is part of the "Estudio 1" series
- La inocente (1972) IMDb. This is a Mexican production shot entirely in Mexico, so Enrique's appearance would seem highly unlikely, the credit presumably belonging to another actor of the same name.
- Im Auftrag von Madame (1974 TV series) Season 2, episode 3: "Hotelmarder". IMDb
- El hijo de Angela Maria (1974) IMDb. This is another Mexican production shot entirely in Mexico, see above.
- Venus de fuego (1978) IMDb
- Aquí están las vicetiples (1961) IMDb. There is an Enrique Fernández credited near the bottom of the cast list, but I could not see any dwarf actors in the film, so I think it must refer to someone else (it is a rather common Spanish name)