I have been doing idols on my internship work, so I'll going to ramble about them... a little maybe.
The Folktown Girls
About:
The
 Folktown girls are a group of Folk Music musicians that often performs 
on on Twilight Immortal. It consist of 3 Members Uno Harriebotten (the 
Horse) [middle], Babette Shepard (the Sheep) [left], and Holly Van 
Bolivinna (the Cow) [right]. Out of these 3 Uno is the only one who 
passed the test as a devotee.
History:
They grew up on A
 farmland area in Froqie City. They were once a member of a famous Idol 
Group known as McRoyland Farmyard Cuties, the name taken from their 
senior highschool name. There used to be 6 member on the group but after
 5 years of national fame and half of their member already start doing 
business of their own, they began  to quit the idol world all together. 
One faithful day, Uno met them on Sunrise City (which is a different 
part of the continent) exactly at Twilight Immortal. The three then 
start having a new gigs of their own as each has suprisingly grew fond 
of folk music.
Members:
Uno Harriebotten
After
 the end of her idol career she started her college years, She gained 
public attention after winning the Froqie City Cross Country Marathon 
Run, as some sort cleaning up her father's name since his defeat years 
ago. After a while she met one of the wandering Heralds of the Archeon, 
amazed that the Herald had walked thousand of miles, she soon flies to 
Sunrise City to became a Devotee on her own will. She is also a regular 
on Twilight Immortal, appearing twice a week... minus performing that 
is.
Babette Shepard
After the end of the idol group's life,
 she came back to her hometown in Farmetheria City on Districant 
Continent (a different continent). Years after working on her family 
farmland, she tries to spread her wings on Sunrise City vegetable retail
 industries. She live in an apartment not far from Twilight Immortal. 
She later joined as a devotee after meeting a certain Herald with a good
 voice.
Holly Van Bolivinna
Last but not least of the 
member, she came to her family company as become the general manager of 
certain cereal industry on Froqie City. She later move on to work on the
 hotel business on Sunrise City. Apparently, one night she met Babette 
and Uno on Twilight Immortal. During that night, she saw a live 
performance by one of the devotee and got enticed by their skill on 
using instruments. She later joined the shrine and quit her job... but 
rumor said that she sells the hotel to someone higher...
Concept and Behind The Scenes:
I
 made Uno first since... to be honest, she's based from the oldest 
drawing I did that I can remember... an abstract horse of misshapen 
forms, it was very old and is drawn on God know where... Point is, it 
has lost in time, but it DOES looks like any child drawing you could 
imagine. She's been going through many change, but I decided to make her
 like that... Later, I thought of adding a dash of Uma Musume element. 
But of course, I don't like NORMAL horse race... So, her last name came 
from the worst racer on Japan World Cup... The Haribote Elegy (the 
cardboard box horse.)... Soooo.... yeahhhhh.... That's also why she goes
 to the cross country race....
As for the others, I kinda just make 
Uno as a point of reference, so I took the Old McDoland had a farm kind 
of tropes and... viola, there they are. There are other member of their 
old groups but I decided that they aren't worth as much as these 3...
As for WHY they are folk musician, I kind of get the idea after hearing Disenchantment's Opening theme... A LOT recently...
Their
 first concept art weren't made by my original style, instead, they come
 up from a random idea I had while fiddling around a "certain japanese 
dress up game" where I made the 6 of them and start having ideas about 
idols in Deus Devote's universe.
Reason of Being Cut/Lessen:
They
 doesn't really fiddle with the main storylines... Let alone they didn't
 have much interaction between "other devotees" well, except those on 
the shrine... and on lower ranks. However, since they DO perform on 
Twilight Immortal, they possibly know the looks of the "higher ranks" 
but even so, they don't have much interest to intervene or interact to 
the main story what so ever.