| Term | Definition |
| Bella Swan | main female character, human, soul mate is Edward Cullen, human, in love with Edward |
| Edward Cullen | main male character, vampire, soul mate is Bella Swan |
| Alice Cullen | sister of Edward Cullen, vampire, soul mate is Jasper Hale |
| Rosalie Hale | sister of Edward Cullen, vampire, soul mate is Emmett Cullen |
| Jasper Hale | brother of Edward Cullen, vampire, soul mate is Alice Cullen |
| Emmett Cullen | brother of Edward Cullen, vampire, soul mate is Rosalie Hale |
| Esme Cullen | mother of Edward Cullen, vampire, soul mate is Carlisle |
| Carlisle Cullen | father of Edward Cullen, vampire, soul mate is Esme Cullen |
| Renee Swan | mother of Bella Swan, human, lives in Arizona and Florida |
| Charlie Swan | father of Bella Swan, human, police officer in Forks |
| Mike | friend of Bella Swan, human, asks Bella to the prom |
| Victoria | enemy of the Cullens, vampire, soul mate is James |
| James | enemy of the Cullens,vampire, soul mate is Victoria |
| Laurent | vampire, travels with James and Victoria |
| Jacob Black | best friend of Bella Swan, werewolf, imprints on Reneesme |
| Reneesme Cullen | daughter of Bella and Edward Cullen, half human and half vampire has the nickname Nessie |
| Jessica | Bella's friend for a little while in Twilight, has a crush on Mike |