Nanachi by LunaKittyfox on DeviantArt

What is Riko noticing here? I am drawing a blank for some reason. : r/MadeInAbyss

Made in Abyss- Fukaki Tamashii no Reimei - 01 - 67 - Lost in Anime

Made in Abyss, Chapter 8 - Made in Abyss Manga Online

bondrewd, prushka, and meinya (made in abyss) drawn by saiko67

Read Boy's Abyss Chapter 67: For Your Sake - Manganelo

Made in Abyss - 02 - 67 - Lost in Anime

bondrewd and prushka (made in abyss) drawn by saiko67

Tales of the Abyss Trading Card - No.67 Ending Epilogue 9 Limited Edit – Cherden's Doujinshi Shop

Gegege no Kitarou - 67 - 30 - Lost in Anime

Made in Abyss Manga Recap Chapters 40–45 (And What the Hell is Going On In The Ilblu Village), by Nopal Dude