|Family:|| Henrik Johanssen (father/creator)|
Bonnie Johanssen (surrogate mother)
Gracie Rollins (sister)
Donnie (half-brother; via Henrik and Helena)
Arthur (half-brother; via Henrik and Helena)
|First appearance:||"Newer Elements of Our Defense"|
Abel Johanssen was created by Henrik Johanssen in an effort to have a son from the original Castor DNA stolen from Ethan Duncan. Abel died an infant, shortly after Bonnie gave birth to him. It was believed by Mark and Rudy that this baby's remains might be able to cure the Castor clones' neurological condition.