Rin Baio is Rentaro's 22nd girlfriend from 100 Girlfriends franchise. She takes pleasure in any affection of violences, and gores, which started after watching a scene from a Resident Evil movie as a child. Fearing that she will be judged for this, she mostly keeps this under wraps.
She tends to say "violen-suwa" ("molto violento" in the official translation) when she gets excited/aroused; this is a combination of the word "violence" and "desu-wa".
With her sharp sense of hearing, Rin can recognize and read the environment just by the rhythm of sound.
