Jaq is the leader of Cinderella's mice and proves to be a good one at that. Jaq was shown to be the first of the mice to actually confront Lucifer and the only one brave enough to take him on alone. Like the other mice, Jaq is caring for Cinderella and thinks of her as a mother or big sister. He holds a brotherly bond with Gus, who he is seen with on a regular basis.
Gus, or Gus Gus, is Jaq's best friend and rather dimwitted compared to his buddy. Other than his friends and family, his number one priority is making sure his belly is always treated right. Despite his small size, he has a tough mind and a running gag shows him putting up his fists if Cinderella is ever threatened only to be stopped by Jaq. He is the main target of Lucifer, who prefers Gus out of all the mice because of his plump size.
In the first film, Cinderella rescues the mice from traps and the cat Lucifer, dresses them, and then feeds them. They perform many small favors in return. Jaq seems to be one of the leaders of the mice, planning strategies to avoid the cat, sneak food, and help Cinderella with her ball gown. The other mice gladly follow his lead. Jaq is thin, with scruffy hair, and speaks a fast kind of pidgin English.
Gus appears in the first scene of the film, trapped in a cage where Jaq finds him and brings Cinderella to rescue him. Cinderella names him "Octavius," and calls him "Gus" for short (This is an example of an inside joke among the writers and (some) viewers of the movie. Gus is actually short for Augustus. In ancient Rome, Octavius was renamed Augustus when he became Caesar, hence Octavius- Augustus- Gus).
Jaq explains the situation to Gus, and Gus catches on and joins the mouse troop. Gus seems to be a bit slow on the pickup, but brave in a pinch, and speaks even more broken English than Jaq, who calls him "Gus-Gus".
Gus and Jaq are responsible for stealing the key to Cinderella's room from the wicked stepmother, Lady Tremaine, and freeing Cinderella to try on the glass slipper, which of course fits. They are last seen in the film in tiny palace uniforms, eating and waving at the wedding of Cinderella and Prince Charming.
Cinderella II: Dreams Come TrueEdit
In Dreams Come True, Jaq and Gus were also present, living in the castle along with all the other mice. It was Gus' idea to make the new book of stories to replace the old one.
In Cinderella's story, Jaq and Gus helped Cinderella to prepare for the ball and gave her support when she doubted her abilities.
In Jaq's Story, Jaq, feeling useless, wishes that he were a human; Fairy Godmother grants this wish and Jaq tries to help Cinderella and the others prepare for the fair. However, Pom Pom becomes obsessed with catching what she assumes to be an enormous mouth. He realizes he liked being a mouse better and returns to normal in order to stop an elephant from destroying the fair.
In Anastasia's Story, they attempt to help their old nemesis Lucifer win the affections of a female cat named Pom-Pom (the mice's new nemesis (and probably Bruno's new nemesis) and Lucifer's crush) in the castle in the hopes the cats (the mice's nemeses) will then leave the mice alone. However, Lucifer goes back on his deal when Pom-Pom tricks him into chasing the mice. The chase ends when Pom-Pom gets dowsed in water and dumps Lucifer out of spite. Jaq and the mice, who aren't happy about the double-cross, give Lucifer a good whack on the head, with Jaq promptly telling Lucifer that "The deal is off!"
Cinderella III: A Twist in TimeEdit
In A Twist in Time, Jaq and Gus make their opening appearance helping the Fairy Godmother prepare for Cinderella and the Prince's anniversary party. After Lady Tremaine reversed time and made the slipper fit Anastasia's foot, they helped Cinderella search for the Prince, (wreaking havoc in the palace kitchen in the process).
They discover Lady Tremaine's use of dark magic by witnessing her cast a spell on the Prince to forget Cinderella (and think that he danced with Anastasia). In a plan to steal the wand back, they succeed in taking the wand from Lady Tremaine, but she has Cinderella arrested with a banishment sentence before she can lift the spell on the prince.
Jaq and Gus manage to convince the prince that Cinderella is the right girl through a catchy showtune "At The Ball". They later help Cinderella put on her wedding gown, but the three are magically sent away by Lady Tremaine, who assigns Lucifer the cat to drive them in a pumpkin carriage over a cliff. After they narrowly escape their deaths, Cinderella, Jaq, and Gus return to the palace where the mice attack the entrance guards to let Cinderella through to the wedding. After Lady Tremaine is defeated, Jaq and Gus are seen celebrating Cinderella and Prince Charming's wedding.
The mice are last seen in Cinderella III during the closing credits in a picture with a very decorated King, one with them stuffed with cheese, Gus in a rather sophisticated uniform, and the final picture in a photo booth style series with Cinderella, the Prince, and the two mice.
In Kingdom HeartsEdit
Kingdom Hearts Birth by SleepEdit
Jaq makes an appearance in Kingdom Hearts Birth by Sleep, without Gus. He is first present when Ventus is trapped in a mouse cage and informs Cinderella to rescue him. After he was released, he teams up with Jaq to collect materials in order to make a dress for Cinderella to let her attend the royal ball. When Ven steals a pearl from Lucifer, he gets cornered and Jaq saves him by throwing yarn balls. But the cat knocks him down from the dresser he is standing on and corners him until Ventus comes to his rescue. After the cat's defeat, they're able to make the dress for Cinderella in time and let her dream come true. Jaq and Ven later sit by the window, observing the Castle of Dreams in front of them, discussing their dreams.
During Aqua's visit, she gets shrunk to a mouse's size by the Fairy Godmother after Lady Tremaine trapped Cinderella in her room and meets Jaq who is with the key and making his way to Cinderella. When he gets cornered by Unversed, Aqua defends him, allowing him to get the key to Cinderella and free her before the Grand Duke leaves.
Story of Joining the TeamEdit
When Sora, Aqua, Avery, Finn and Lock were searching for someone that was the soon to be new member of the team, Jake was searching also but behinds their backs, and when Jake was in the palace, he met Jaq and Gus in a mouse hole when he snuck in. Jake asked if there was anyone that was pure of heart and has the spirit of a hero or heroine. When they got out of the hole, a vase was falling off the balcony and almost squashed the mice, but Jake stopped it and when the vase broke, Heartless and Nobodies came out and attacked Jake. Just as when he was almost finished off, the mice rescued him, and Jake was so greatful he offered the mice to join the team, and he asked just when Cinderella and The King showed gratitude for joining the team.