User blog comment:LilyLacreag/Akage no An - My Review and the Summary/@comment-3499220-20190429220933

I did some Googling and Mrs. Allan's voice actress is Kotoe Taichi (太地琴恵) who use to work under two pseudonyms, one of them being Saiko Egawa (江川菜子). Looks like she also voiced Priscilla and Prissy.