Defender of Earth is Prinny Kurtis' class in Disgaea 4: A Promise Unforgotten. To obtain, Extra Stage 7, "Defender of Earth Appears!!", must be cleared. This bill is unlocked by passing the "Fight the Defender of Earth!" bill, which is unlocked by talking to Prinny Kurtis 5 times in Innocent Town to unlock the bill. (Unconfirmed) If you talk to Prinny Kurtis 6 times, it will reset the amount of times you talk to Prinny Kurtis if you didn't pass the bill.