|Prototype Model Unit XJ-5|
|Age||Unknown (Older than XJ-9)|
|Occupation||Superhero/crime fighter (When awake)|
|Likes||Talking, helping people, saving the world|
|Dislikes||The Cluster, Smytus|
|Family|| Nora Wakeman (creator/mother)|
XJ-1, XJ-2, XJ-3, XJ-4 (early prototypes/sisters), XJ-6, XJ-7, XJ-8, XJ-9 (later sisters)
Wisteria Wakeman (aunt)
Glenn Wakeman (cousin)
|Friends||Brad Carbunkle, Tuck Carbunkle|
|First appearance||Sibling Tsunami|
|Voiced by:||Kath Soucie|
Prototype Model Unit XJ-5 is a radio-like robot with a satellite dish for a hand and one of the XJ robot sisters created by Dr. Noreen Wakeman.
She seems to be the chatterbox of the sisters, though she does have great leadership skills, seen when she managed to lead the XJ sisters in fixing a dam. In turncoats she doesn't speak instead she plays music even when she is sacrificed.
Sibling Tsunami (Her first appearance)
Designing Women (Brief Cameo)
Agent 00' Sheldon (No Lines)
Escape from Cluster Prime (Brief Cameo)
Labor Day (Brief Cameo)
Turncoats (Doesn't talk instead makes radio music)
- She is voiced by Kath Soucie, who provides her with a voice very similar to her other voiced characters, Betty DeVille from Rugrats and Toll of Totally Spies.