Fluffy is Peter's cat. Peter sometimes calls her Fluffy Wuffy and she always sticks with Peter, Henry and Fang.
Fluffy is Perfect Peter's female white Persian Cat who feuds with Horrid Henry's hamster, Fang. In certain episodes Fluffy is known as a male. Fluffy is shown in most episodes sitting by the sitting room window still at night and as she clicks the TV remote control button next to her, the scene changes to sunrise.
Fluffy is incredibly lazy and like other cats normally eat, drink, walk and sleep. In the books, she mostly sleeps, making her nearly the opposite of Fang. She loves scratching up the sofa and mostly shedding up paper with her claws as shown in Horrid Henry Nothing But Truth and the ending for Horrid Henry's Diary. She's also known to be addicted to tickly treats. In Horrid Henry and the Catastrophic Cushion she loves sleeping on the sofa and the Gross Class Cushion. She is an amazing dancer when it comes to music.
When Henry goes downstairs, he mostly steps on Fluffy's tail but in Horrid Henry Where's Fluffy? Fluffy cannot stand Henry tormenting Peter, so she runs away. She is shown to provide a great distraction for Henry in Horrid Henry and The Best Boy's Sleepover. However, she furiously shreds Henry's diary after Henry insults her in Horrid Henry's Diary. in later episodes She likes Henry a lot as they watch TV.
Fluffy extremely loves Peter, and in Horrid Henry and the Tickly Treats Thief, she makes herself very innocent when she was accused for the stealing the gummies, this made Peter cry because he was defending Fluffy.
Fang and Fluffy have a stronger friendship in Series 4, they use the tablet to play music and then dance together, they also take pictures with it. Fang and Fluffy also team up in Horrid Henry's Animal Antics.
Fuffy appears to be a small, bluish grey cat with green eyes and a blue collar with a yellow name tag.
- Fluffy normally uses the remote during the night to switch to day but at the arrival of Series 4, she use the tablet.
- She is lazier in the books but can dance in TV series.
- In Horrid Henry Where's Fluffy?even though Fluffy isn't there, the sun still comes up.
- In the Horrid Henry Where's Fluffy? episode, Fluffy is a male but in the rest of the episodes Fluffy is a female.