Robert and Roberta Knott had a field in the Undercity where they grew flowers that have never seen the light of day. These flowers are used in Category:Witchery for curses, hexes, and potions.
Roberta Knott was a friend of Erwin.
Roberta Knott was killed by Violet Foyle when she defended her home and husband from Violet and her friends. Robert Knott was later questioned, tortured, and killed by Edwin in an attempt to find out where Liam Aurelius and his friends went.