She’s a very mean girl who bullies Usagi at school. Richi would call Usagi rude things like “bun-head” and “crybaby”. If Richi didn’t get her way, she would throw a tantrum (like flipping a table over)
There are roughly one-sh*t billion tropes so PLEASE look through them before adding one. Otherwise add what you like. ADDITION: PLEASE read through the trope description provided before submitting something. It's not a huge deal but too often people submit characters that don't fit just because they misinterpreted the title...