Are authoritarian successor party (ASP) supporters more likely to protest? I propose that ASP supporters are less likely to protest in general. The post-democratization mobilization environment is shaped upon the pre-democratization mobilization basis. During the pre-democratization period, protest was organized around the democracy movement. Thus, protest tactics and networks were accumulated through it. As former authoritarian ruling party supporters, ASP supporters are less likely to have legacies of participating in the democracy movement, which prevents them from accessing the accumulated protest resources from the democracy movement. However, I argue that this negative association varies based on the ASP qualities and supporters’ age. Supporters of ASPs that maintain strong pre-democratization legacies are more likely to participate in protests than supporters of ASPs that do not strongly highlight their authoritarian legacies. Also, when the ASPs’ characteristics are considered, older ASP supporters are more likely to participate in protests than younger supporters. Using both single-level and multilevel statistical analyses, I examine four Asian countries with politically powerful ASPs and find evidence supporting my hypotheses. Lastly, I compare two South Korean mass movements, the Candlelight movement and the Taegeukgi rallies to unpack the relationships between ASP supporters, protest resources, and mobilization. This study reveals authoritarian legacies among post-democratization citizens through ASP supporters’ protesting behavior.