Clara’s Mom (Mrs.Valac) Was a Dem-dol
Evidence:
1) They look strikingly similar.
They both have green hair with similar volume and fluff.
They're cloths are the same color scheme of white and green.
The cloths are even the same style with the puffy upper arm sleeves.
They both are sporting a green bow.
Pointed ears (but sure most demons have pointed ears)
Similar completion/skin
Clara's mom has ram horns, but she could be hiding them under her hair or using magic to conceal them.
Plus, we've already seen that Kerori wears fake horns to hid her real ones in order to help conceal her identity.
2) Clara's mom constantly breaks out into song.
The show isn't a musical, but whenever the Valac family is on screen, it's almost a guarantee that a song number is about to happen. Breaking out into song seems to be a very normal thing for their family. She's obviously encourages singing and dance choreography. The fact that this family is so chaotic yet dances in sync is incredible.
The family even breaks into song on stages and preforms for everyone.
3) She has Dem-dol qualities.
She has cute and charming qualities that are expected of a dem-dol and speaks in a very calming manner.
She has 6 children, most of which are very high energy, but she holds their attention and keeps control over them almost effortlessly. Which would make sense if she's had a career as a dem-dol controlling hundreds of rowdy demons at once.
She also strikes poses when singing.
4) The timeline is plausible.
Time line wise, Kerori watched the green haired dem-dol preforming when she was a little kid. Clara is roughly the same age as Kerori so if it was a live performance Mrs. Valac would have had at least 2 kids at the time of that performance which is perfectly plausible. Plenty of female singers have kids and preform. if this is what happened she likely left around when her other sons where born, wanting to spend more time with her family.
Another possibility is that Kerori was simply watching a re-run with her grandmother of a performance, which would easily explain why the dem-dol looks so young if it is Mrs. Valac.
In summery, Clara is most likely the daughter of a dem-dol.
