Jacques

Jacques is a huge black and white tom with a torn ear and yellow eyes.

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. When the rest of the patrol arrive, they help Squirrelflight fight them off.

Twilight

 * He and Susan brutally attack Talonpaw, a ShadowClan apprentice, when Talonpaw is hunting alone. After managing to drag himself back to camp, the young apprentice dies from his injuries. Rowanclaw, who was his mentor, takes a patrol for revenge, but Susan and Jacques flee for their Twoleg nest, and their Twoleg throws something at the patrol, which wounds Cedarheart. Brambleclaw, Brackenfur, Cloudtail, Rainwhisker, Squirrelflight, Tawnypelt, Russetfur, Rowanclaw, and Oakfur launch an attack on the nest, using Tawnypelt as bait to get Susan and Jacques to come out. This was done to cut Susan and Jacques off from the Twoleg nest. Susan and Jacques are let off with a threatening warning: if they ever again harm any Clan cat, they will be killed. He was seen when Squirrelflight pins him down and he spits at her.

Secrets of the Clans

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