Characters' Birthdays/Sun Signs/Traits
| Name (Alpha Order) | Birth Date | Birth Year, Age (as of 1/1/01) | Sun Sign, Element | Personality |
| Firefighters | ||||
| Lt. Harry Briscoe | August 12 | 1949, Age: 51 | Leo, Fire | Respected, courageous, loyal, traditional, intolerant, crass. |
| Manny Fletcher | June 7 | 1965, Age: 35 | Gemini, Air | Confident, funny, strong, superficial, seductive, unfaithful. |
| Walter Frost | Sept. 1 | 1964, Age: 36 | Virgo, Earth | Pragmatic, tough, intelligent, admires mental strength, remote, self-defensive, emotionless. |
| Joe Griffin | Oct. 9 | 1969, Age: 31 | Libra, Air | Perceptive, magnetic, social, procrastinator, focused on others to detriment of self. |
| Chief Edward Hanson | Oct. 18 | 1948, Age: 52 | Libra, Air | Personable, fair, inspires loyalty overstressed, secretive, short temper. |
| Tom "Shic" Josefczyk | June 24 | 1973, Age: 27 | Cancer, Water | Loyal, skillful, musical disbelieving, jealous, sensitive. |
| Lt. Patrick Keane | Dec. 4 | 1949, Age: 51 | Sagittarius, Fire | Good organizer, listener, teacher, controlling, critical. |
| Bette Maguire | April 25 | 1975, Age: 25 | Taurus, Earth | Vigorous, attractive, physical, go-getter, impulsive, inquisitive, blunt, stubborn, loud, insensitive. |
| Deputy Chief Mugar (Book 2) | July 28 | 1944, Age: 56 | Leo, Fire | Power-hungry. |
| Al Ramirez | Oct. 28 | 1951, Age: 49 | Scorpio, Water | Investigative, sharply focused, sarcastic, rigid. |
| Jim Russell (Book 2) | July 26 | 1958, Age: 42 | Leo, Fire | Charismatic ladies man. |
| Stuart West | April 7 | 1961, Age: 39 | Aries, Fire | Energetic, positive, nosy, angers easily, forgives easily. |
| Family & Friends | ||||
| Mary Maguire | March 11 | 1954, Age: 46 | Pisces, Water | Passionate, controlling. |
| Valerie Maguire | Jan. 25 | 1977, Age: 23 | Aquarius, Air | Intelligent, naive. |
| William Maguire | Feb. 10 | 1946, Age: 52 | Aquarius, Air | Self-confident, good business head, prejudiced, quick to anger. |
| Rose St. Pierre | Oct. 8 | 1971, Age: 29 | Libra, Air | Free spirit, indestructible, brilliant, attracted to dangerous people & situations, intrusive, all-knowing, flighty. |
| Un-friendlies | ||||
| Monica Tacomi | Nov. 1 | 1968, Age: 32 | Scorpio, Water | Seductive, treacherous. |