Sense there's "悪魔の百合ドル", I think there sould be a "悪魔のアイドル",too ^p^

Sense[sic] there's "Akuma no Yuriddle", I think there sould[sic] be a[sic] "Akuma no Idol",too ^p^

This is a pun on how "Riddle" and "Idol" end with the same sound in Japanese. Unfortunately, writing it "Iddle" would keep the "riddle" part but nobody would understand it's supposed to be a pun on "idol" then.