Leading Idol appears in Chapters 7 through 9 of Void Quest within the Midnight Channel. It will summon a Platinum Dice Shadow to support it. While it is weak to Electrical attacks, the Leading Idol severely reduces Almighty damage, rendering All-Out Attacks ineffective. Upon being defeated, it may drop the Trial Obsidian material. Selling 10 Trial Obsidians at Daidara will unlock the Yashima daggers for Yosuke Hanamura in the shop.
In Golden it appears in Chapters 3, 4, 6, 7 and 9. It may drop Howlite for trade at Shiroku Pub.