According to translation she IS a granny, also CHARISMA!
"U~? What's wrong, little ones?"
Remillia gently asks the petrified children who have just let out a scream.
"What on earth has made you so afraid do~? It's granny Remi you know do~"
""""Yuwaaaaaahhhahah!! Shcaawwwrrryyy!! Caan't daake it eaaassy!!""""
"Uu-!?"
Even if Remillia explains who she is to the children, it doesn't seem to stop their wailing.
"Remillia.... you're releasing 'charisma mode' aren't you."
".....ah."
"Jeez... Because of that, the children have needlessly had their wits scared out of them..."
"Ah I was thoughtless do~. I'll stop it now do~"
It seem's that due to Remillia's 'Charisma Mode' the children have had a big fright.
On top of that, what the heck is 'Charisma Mode' anyway?