- Her name, "Usagi", means rabbit in Japanese terms.
- She shares the theme: "Popular Street Musicians ~ Incorrupt Tunes" with Koushi. Fuan Satsujin and Hitori, Sutorei and Aruku, Susanoo no Mikoto and Fujin Kaze, and Hagane Zero & Pupa-Chan share different themes too.
- Usagi and Koushi share the same ability (make sounds and perform on her own) and occupation (play music in the village). Taeko Yuhara and Kaoru Fumetsu share the same occupation: "drink blood".