WARNING: SPOILERS AHEAD
Anna Fitzgerald- 13 years old and knows that the reason her parents had her was so that there could be a bone marrow donor for Kate. She hires a lawyer to get medical emancipation from her parents so she will not be forced to donate her kidney.
Kate- 16 years old and older sister of Anna's. She was diagnosed with acute promyelocytic leukemia at a very young age. She has basically lived with it almost her entire life.
Jesse- Oldest child, brother to Anna and Kate. He is very rebellious, and his parents often don't know where he is at. He likes to play with matches and intentionally burns down old vacant buildings with a friend.
Brian- Father of Anna, Kate, and Jesse. His is a firefighter. Although he lives at the firehouse a lot and called away often, he is a very loving and attentive father.
Sara- Mother to the three teens. She has desperately cared for Kate since she was diagnosed. Although she clearly loves her other children, the high level of attention she gives to Kate does not give her much time to...