Susan

Susan is a small light brown tabby she-cat.

Starlight

 * When the patrol of Squirrelflight, Brambleclaw, Mistyfoot, Crowfeather, and Tawnypelt look for new territory, Susan and Jacques almost kill Squirrelflight when she wanders into the garden of their Twoleg Nest.

Twilight

 * She and Jacques attack Talonpaw, a young ShadowClan apprentice, who later dies from his injuries. Rowanclaw, who is his mentor, takes a battle patrol for revenge, but Susan and Jacques flee for their Twoleg Nest, and their Twoleg throws something at the patrol, wounding Rowanclaw and damaging Cedarheart's leg. Brambleclaw, Brackenfur, Cloudtail, Rainwhisker, Squirrelflight, Tawnypelt, Russetfur, Rowanclaw, and Oakfur launch an attack on the nest, and Susan and Jacques are let off with a warning: if they harm any other Clan cat, they will be killed.

Secrets of the Clans

 * Susan and Jacques are mentioned for the first time by their names in this book. They are both described as bullies who like to attack or even kill cats who are alone and weak. They escape into their Twoleg nest when they begin to lose a fight. It is also mentioned that they were later punished for their deeds by ShadowClan and ThunderClan.