Joan of Arc
Joan of Arc is a sacrifice program. It remains "active" in memory at all times via an auto-exec function inserted into the CPU, so it doesn't need to be specifically activated by the 'runner. If any other program operating through that CPU is damaged by anti-program software, the damage is automatically routed to Joan. Joan contains a re-rezz function, so it might reconstruct itself after suffering de-resolution.
Options: Auto Re-rezz