how to find bel?
Bell is in one of three places: Forest Park Cave, New Ark City Jail or Transylvania Streets. If you have other questions, look at the wiki.
You have to ask about her disappearing or she will NEVER show up. Once you are told she has disappeared, it'll be in one of the 3 places mentioned.
gift her a neck bell next time so she wont wander off again, you can find that at the ark mall.