| Term | Definition |
| Ultima | Elderly curandera and mother of Maria Luna |
| Antonio Marez | Protagonist. Six years old, serious, thoughtful, and prone to moral questioning, and his experiences force him to confront difficult issues that blur the lines between right and wrong |
| Setting | New Mexico |
| Gabrial Marez | Antonio's father, a vaquero, and restless wanderer |
| Maria Marez | Antonio's mother, a devout Catholic, and Ultima's daughter |
| Narciso | the town drunk |
| Tenorio Trementina | Antagonist and malicious saloon-keeper and barber in El Puerto. Hates Ultima because she lifted a curse off of Lucas. Has three bruja daughters. |
| Cico | Quiet and gentle boy who introduces Antonio to the golden carp |
| Florence | Does not believe in God and is orphaned with prostitute sisters. He shows Antonio that the Catholic Church is not perfect and that religion can fail. |
| Horse | He wrestles with school mates |
| Bones | Everybody is scared of him because he is wreckless and crazy. |
| Ernie | Braggart. Teases Antonio. |
| Vitamin Kid | Fastest runner |
| Red | Protestant |
| Lloyd | Reminds everyone that they can be sued for even the most minor offenses. |
| Abel | Smallest boy. Urinated in the Christmas program. |
| Lupido | War veteran. Has mental problems. Murdurers the local sherrif, Chavez' brother. Antonio witnesses him being killed by a mob. |
| Andrew, Eugene, and Leon Marez | Antonio's older brothers. Fight in WWII. Ruin father's dream of ever moving to CA. |
| Deborah & Theresa Marez | Antonio's sisters |
| Lucas Lunas | Antonio's uncle. Ultima lifts him from a curse. Antonio's other uncles are Juan, Mateo, & Pedro. |
| Father Byrnes | Catholic priest. Teaches the boys at Chatechism to fear God. |
| Chavez | Jason's father. He leads a mob to find Lupito after Lupito kills Chávez's brother, the local sheriff. He forbids Jasón to visit an Indian who lives near the town, but Jasón disobeys him. |
| Jason Chavez | One of Antonio's friends. He disobeys his father when he continues to visit an Indian who lives near the town, but Jasón disobeys him. He has an indian. |
| Prudencio Luna | Antonio's grandfather |
| Samuel | Vitamin kid's brother. Tells Antonio about carp. |
| Tellez | Challenges Tenorio when Tenorio speaks badly of Ultima |