Tyramigo's learning Japanese while still mispronouncing "Melto" makes more sense if you've noticed that all the Ryusoul Tribe members' names (including Canalo, Seto, and Nada) comprise of syllables that are often heard as part of Japanese words, except for Melto.
The Mummy Minusaur is grown from one Ryusoul woman's desire to finally die along with her mortal lover. Real mummies are infamous cases of people who mostly take all of it with them when they go, as tombs tend to be full of not just all the treasure they hoarded in life.
With a Ryusoul inserted into a Ryusoul Changer and its visor flipped to cover the eyes, the sword of the Ryusoul becomes a "helmet feather" or sorts for the Ryusoul Changer, the design aesthetic being much like how it was a common trend to depict knights or even dragons in knight armor to have a feather atop of their helmets.
In episode 25, it's rather convenient that nobody re-uploaded Kreon's minosaur-infested video back on the internet after Kreon himself deleted it. However, this makes sense. Anyone who watched the video has their souls stolen and was left catatonic. They wouldn't be able to re-upload the video if they can't do anything at all.
In episode 34, Oto, a child, is shown working on a cafe as a waitress. This would be very unusual normally, but it makes sense when you remember Oto is also from Ryusoul tribe. She has lived for so long, she most likely already finished all the education she can get, so the only thing left to do for her would be working to get some money.
A year of a Ryusoul Tribesman's lifespan is likely implied to be equivalent to ten years of human time, as shown with Koh (209 years old but looking 20) and Oto (123 years old but looking 12).
Oto is shown to be in mortal danger when she's hurled from a building, until Pterardon turns into his flight form and saves her... then later she joins the battle by jumping down from Pterardon herself. When he's still flying.
When Bamba and Towa attempt to kill Ui to stop the Minusaur, the fact that they act like this is the only option and that they do it so casually implies that this isn't the first time they've done it. How many innocent people did they kill before joining up with the other Ryusoulgers?
