Dog Stereotype: Kishu are known for being headstrong, strong-willed hunting dogs. Hanako does display the loyalty and devotion associated with Kishu, but she's a playful cloudcuckoolander who couldn't hurt a fly.
Unintentionally inverted in practice. Even though he's supposed to have English as his first language, in the anime it's quite clear that his voice actor can't quite pull it off, using "me" where an English-speaker would say "I" (possibly a translation hiccup, see Japanese Pronouns below), and pronounces "white lady" as "hwite rady."
Betty and Veronica: He's the Veronica to Mametarou's Betty. He's rich, haughty, and sophisticated.