Fridge Logic: Interesting how every toilet has plumbing that's bigger than the house itself.
One defining characteristic of Patty, the thief you chase around for the first third or so of the game, is her pair of bat wings. However, it might be a bit more accurate to say she has dragon wings, which especially savvy players might pick up on before it is revealed that she is actually Ryu's long-lost sister, Yua, and therefore a member of the Dragon Clan.
Fridge Horror: Why doesn't Nina ever return to the magic school after seeing her sister home? She got expelled for using her magic outside of its doors!