There are multiple Myth references in the Roki art but if you look closely you see will an odd pattern, among the mascots used near debuts you will find Amelia's mascot right next to Mori's mascot, despite this not matching debut order, number order, alphabetical order, or any order you could think of, must be intentional. You will also find smol Ame in between Mori's tiara and Mori's kimono mask, it might still just be a coincidence, going one shelf up we find that Ame's hat is right next to the deadbeats pillow and guh sign, alright its getting odd for sure, then if we turn our sights to the bottom left we will find Ame's magnifying scope right next to death sensei and Mori's deal with it sunglasses.
Looking at this the only sensible conclusion is that rainforest is/was intentionally and knowingly supported by Mori Calliope. Also when the Myth members join in Ame appears first and she gets to stand next to Mori.
https://youtu.be/8nI1CDsNZI0 
