Chapter Text
After the war, Diana doesn't see Isabel for years.
In that time, Diana is off taking care of the world, and Isabel is working on a kind of serum that will grant her eternal life.
When Diana chose not to kill Isabel back when they first met, Isabel swore that she would not rest until she could find the demigod again. This meant that she had to stop herself from aging past Diana. So with extensive research and self experimentation, she was able to create an injection that would grant her eternal life for as long as she took it.
During this time she was trying to keep up with what Diana was doing around the world which proved to be pretty easy. Through the evolution of world news, Isabel was able to read about this 'Wonder Woman' in the news. After all, she appeared on the cover of almost every paper for years and years after the first world war.
Every time she found an article about Diana, she would read it and then burn it. Watching Diana's picture burn up in flames gave her some sort of satisfaction, although sometimes after the picture was gone, she would miss it. Seeing Diana in the paper sometimes felt like her only connection to the demigod.
It wasn't that she was fueled out of hatred-- although that was most of it --she was fueled out of curiosity. Isabel wanted to open up Diana and see how the amazon worked. What made her tick. There was nothing more fascinating than Diana to Isabel. It just happened to be that they had a past together. A small, but very intense and conflicting past.
Little did she know, Diana was keeping track of her too.
Diana never saw Isabel in person while she was tracking her, but she stayed close enough to make sure that the chemist wasn't planing anything dangerous. After enough time passed for Isabel to have aged considerably, Diana became confused as to how the chemist stayed in the same state. Diana didn't trust that Isabel would stay dormant for long, and she couldn't risk the chance of another war being started by Isabel's hands. Even though Isabel never outright did anything destructive, she was always plotting and creating things that could prove to be absolutely terrible. It wasn't the war that had turned her into who she was. The war was only an outlet for her creations, and those creations didn't stop after the war did.
Sometimes people would recognize Isabel's face and she would have to move. This eventually made her used to not staying in one place for long. It wasn't very emotionally hard to move often-- she stopped getting attached to things a very, very long time ago-- it was just physically tiring. Unknowingly, it also made it harder for Diana to keep track of her.
After years of staying on each other's trails, the two ran into each other in a small town somewhere not far from Rome.
There, Diana explains that she has been keeping track of Isabel since the end of World War I and questions how Isabel is even still alive. Isabel says nothing, but listens to Diana's story in horror and then leaves.
Furious that Diana has been keeping tabs on her, and very shaken after seeing the amazon in person after so long, Isabel decides to wipe out the town and escape in the chaos. Thankfully, Diana is able to stop her before she can do any damage, and from there Diana takes her into custody and moves her somewhere isolated where Diana can frequently check up on her.
Sometime in the late 2000's, Diana comes back to check up on Isabel and is alerted by the locals that 'the evil Doctor Poison has been spotted and must be killed'.
Diana then decides that the best thing for Isabel is for her to move in with Diana somewhere new.
Isabel strongly resists at first, but because she is so tired of having to move so frequently, she gives in.
Which is how they end up as housemates.
This series begins a long time after that somewhere in modern day.