"I live for the crusade; I die for our crusade."
That was the oath Cassandra "Cassie" Castle’s so-called friends swore by until they turned on her. Until the beatings began. Until they left her bleeding in a back alley, without a second glance.
Cassie never forgot.
She took their creed and twisted it into her own vow. No longer a follower, she embarked on her own crusade. With her parents too frail and old, and no one else to rely on, Cassie became the shield for her younger brother, Frank.
But Frank Castle, even as a boy, had a spark for wanting to hurt people. He was too angry, too wild, and too similar to the number of gang fights and beatings she had endured. Cassie never knew how to handle him, but she tried her best to figure it out. She never wanted to change him, not at all.
Like Frank, she too had felt the allure of bloodlust, but kept it in check until things became overwhelming, leading her into trouble that cost her an arm. That experience pushed her to get a prosthetic from a sketchy person, but the risk felt worth it. However, the next challenge was getting addicted to a drug called Red Angel Dust, which made her feel alive and free, much like Frank. She, too, sought her own form of justice.