Bijou (リボンちゃん, Ribon-chan, Ribbon-chan) is a female hamster with white fur and blue ribbons, the love interest of Boss and maybe of Hamtaro. She is a somewhat unworldly hamster who loves her blue ribbons, but she is not above getting dirty when she needs to help her friends, and has been known to be generous and helpful.
Bijou is owned by Maria who moved to Japan from France. In the Japanese version, she speaks normal Japanese and adds the words "dechuwa" (most likely a hamster version of "desu wa") at the end of her sentences, while the English version of Bijou has a French accent. Oshare also adds "dechuwa" at the end her sentences, perhaps because they both hail from France. Boss has a huge crush on Bijou, but she only considers him as a big brother. Bijou's best friends are Pashmina, Penelope, and Hamtaro. They know about Bijou's crush on Hamtaro and Bijou knows about Sandy's crush on Maxwell.
Bijou has a crush on Hamtaro. Although Hamtaro is completely clueless about it, he has shown signs of liking her back. In the first episode, she winks at Hamtaro after he sings and dances for her with Oxnard and Boss. Her crush on him becomes stronger in Come Out, Bijou! after Hamtaro compliments her ribbons. It becomes more obvious after Bijou's Favorite Ribbon, which is an episode centered around the relationship. There are a few more cases of a strong relationship in episodes such asI Want To See You, Bijou! and Satisfied Bijou, where it is taken a step further and they go on a proper date.
Boss has a crush on Bijou, however, she is unaware of this. She attributes the attention he pays her to simple generosity. She does care about Boss and values his friendship, but he is more like a brother to her. Boss sparks many attempts to win her over, even if some mean risking seasickness. The relationship may be poked at less and less as the series goes on.
In earlier episodes, Panda has a crush on Bijou. This is also confirmed in the Tottoko Yoroshiku! Hamuchans introductory CD, in which he says he would like to build something for her and wonders if she likes him back. However, it seems like Boss's domineering personality and over-protectiveness of Bijou was too much for Panda. He even says "There are too many rivals!" in regards to how many Ham-Hams have a crush on Bijou. As a result of this and Bijou not viewing him in a romantic way, this crush seems to have died out early on.