Wally's younger sister, Susie despises the Tunnel Snakes, and Wally won't dare tease her, because she will give worse than she gets. She has a secret crush on Freddie Gomez, but no respect for you. However, she becomes more philosophical and befriends Amata after the Lone Wanderer's escape.
If the Lone Wanderer approaches her before the G.O.A.T. examination, she expresses her desire that there will never be friendship between the two and, if the Lone Wanderer knew any better, they would avoid her.
After the G.O.A.T. examination, Mr. Brotch revealed that Susie is headed for a teaching career, sarcastically noting that it was due to her "gift of communication."
She seems to have a crush on Butch DeLoria. During Trouble on the Homefront, in a conversation the Lone Wanderer can overhear between her and Christine Kendall, Susie will ask if it feels strange bunking with Old Lady Palmer. She will then go on to say, "Don't you wish it was just Butch?"
Depending on how the Lone Wanderer completes the quest Trouble on the Homefront she may be found in the wasteland, and will either be very happy to see you or will be found dead.
While Susie doesn't appear during the birthday party in Growing Up Fast, her unused 10-year old model exists in the G.E.C.K.