Elizabeth "Betty" Mary Jenkins was a neighbour of Guy Wildman. Betty lived in Flat 4 of the Splott apartment block.
Wildman would look out for Betty, and a friend from the social club got her groceries.
In order to access Wildman's apartment, Gwen Cooper and Jack Harkness pretended to be delivery drivers for Tesco Direct. Betty granted them access.
After having met a "Betty Jenkins" in Wildman's apartment, Gwen found out her address from Toshiko Sato and returned to ask follow-up questions. Upon seeing the real Betty Jenkins, Gwen realised that she had been tricked.
Betty was resolute in her beliefs. She was querulous and cynical, and maintained a firm belief that the past was better than the modern world. She was highly security conscious, securing the door to her flat with several chains.
Betty had long grizzled grey hair and a face to match. To Gwen, she appeared to be a scary spinster in her mid eighties. (PROSE: Another Life)