Kayla is a little girl and the owner of Fatty Bear in Fatty Bear's Birthday Surprise. She spends most of the game asleep in bed, not only because it is nighttime, but because the next day is her birthday. She doesn't ever see Fatty Bear or his fellow toys alive; however, she seems to know they come to life when she's asleep, as she talks to him.
At the end of the game, she wakes up and is surprised to see her room decorated and the cake made and presented. Kayla then receives a puppy on her birthday, and thanks everybody, especially Fatty Bear.
She was voiced by Devinne Jackson. In the Japanese dub she was voiced by Koorogi Satomi.