Dr. X created Bel . After she was created it first seemed like she also failed like his first one but eventually she began to move, shortly followed by some words which meant she worked.

Bell was send on several missions by X. After Bell had finished a certain mission with GIR she encountered a hooded girl who asked her why she was doing this and said that X was using her to destroy the Powerpuff Girls, like she was a minion rather than a daughter. Bell disagreed and wanted to fight her but she