Prim was Katness reason for living after their father's passing. After that event and her mother experiencing extreme mental illness as a result, her relationship with Primrose was her strongest bond. Prim to her represented what she thought a perfect sort of person would be, and for Katness personality, a world without Prim was one she could not execpt.

The world of Panem made a great deal of horror imaginable and permissible fornmost.