idol 129 slotBefore you can use Idols, you need to unlock their slots. The Idol Inventory starts small and expands as you progress through the story. You can unlock all 20 Idol slots by completing certain main quests and side quests. IfIdol., Episode 129 of Cursed Fact of the Day in WEBTOON. When you're a robot detective and have no cases to work on, what else are you gonna