Parad Dan, known as Kamen Rider Para-DX in the series Kamen Rider Ex-Aid, is a Bugster and serves as both a main antagonist and later an ally. Initially, Parad acts as a mischievous and cunning rival to Emu Hojo, embodying the human side of the Bugster virus. Over time, he develops a complex relationship with Emu, eventually fighting alongside him against greater threats. Parad's unique personality and transformation abilities make him a standout character in Kamen Rider Ex-Aid.