The albino siblings are named Tin and Tina after St. Augustine (San Agustín in Spanish; 354-430 AD). He was a writer, theologian and philosopher who after he was turned into Christianity worked as Bishop of Hipona, Argel (North Africa). He is considered as father of the Western Church and in 1295 Pope Bonifacius VIII named him Doctor of the Church by their extensive work in life and writings about faith and religion.
The movie reunites by first time two of the most popular icons of the 80s for kids in Spain, Teresa Rabal and Chelo Vivares. At early-mid 80s, Rabal was a singer star specialized in music for children, and Vivares played Espinete, a pink humanoid hedgehog, in the TV show Barrio Sésamo (1979).
Reunites Ruth Gabriel with Chelo Vivares after the TV show Barrio Sésamo (1979). From 1983 to 1987, Gabriel played child Ruth and Vivares played Espinete, a pink humanoid hedgehog.
At 27 minutes into the movie Tin reads the same bible passage that Julius uses a lot in Pulp Fiction.
When Lola is looking through the twins Bible (1 hr 5ms 50 secs) passages from The Bible are seen on the second drawing. Matthew 12 and Samuel 17. Although not specific quotes, the story of Matthew 12 is of Jesus and his disciples eating grain during the Sabbath, explaining that laws can be broken if it's done for good reason, which in the eyes of Tin & Tina, could've been what they were doing on the holy day to their bully. Samuel 17 is the story of David and Goliath. This one is more literal and apparent, the two weaker twins defeating their stronger bully with God on their side in their innocent eyes, using their cross-slingshots. Both show that in the perspective of the twins, their doings are innocent, and are seen as something God would understand.