An insane person who likes cheese. However, DO NOT ask what her favorite kind of cheese is, she'll probably insult you. I'm talking from experience here. When arguing with a Bella, she'll yell at you in a British or Australian accent, but never a Russian one. Be careful when fighting a Bella, their power levels range from 20000 to 4628735673820652708652347085257804. Good luck.
person one: YO ITS A BELLA
person two: RUN