Kitten is a young cat that Giroro found and has since lived with him in his tent.
She seems to also have a crush on Giroro and for that she's grown to dislike Natsumi. In Episode 12, she is found by Giroro in the rain. After that she makes numerous appearances. Most of which she is seen next to Giroro! In the first movie, she lets go of her hatred towards Natsumi for a brief moment because of Giroro's departure!