Usada, Hikaru

うさだヒカル, ラ・ビ・アン・ローズ

Usada, also known as Rabi~en~Rose, is revealed to the viewer as Dejiko's rival. Her nickname may be a play on several things. "Rabi~en~Rose" could be a play on the common French phrase "La Vie en Rose," which translates to "life in rose-pink." The Japanese expression "spend a life in rose-pink" means to live without any worries. "Rabi," which resembles the English word "rabbit," replaced "La vie" to create a pun meaning "Rabbit in life without worries," suggesting her personality. Her original name is Hikaru Usada, which resembles Hikaru Utada (best known in the West for her theme songs for the Kingdom Hearts series), but this was officially stated to be a mere coincidence since the story and names were decided before Hikaru Utada's debut in Japan. Her surname "Usada" is also a pun, as the "Usa" part is a shortening of the word "usagi," which means "rabbit" in Japanese.
In the original anime, she appears as a normal girl who uses dice to transform into her bunnygirl outfit: a pink, white, and red dress with large white rabbit ears and a large round cotton tail. Her parents left her to live on her own in an attempt to help her become an idol. Rabi~en~Rose does not end her sentences with a rabbit sound (typically pyo in anime) and is the only character with kemonomimi animal traits in the Di Gi Charat franchise not to do so.
She is very competitive and always tries to start something with Dejiko. In some of the manga stories, however, it is shown that she really just wants to be her friend, and this is hinted at in various ways, often ending in a comedic gesture.