Helena began the process of binding to her soulmates by first asking Pasor and Ariel if they wanted to be her soulmates. Both answered in the affirmative.
She told Ariel she would strengthen their bond but she would do the actual binding when Ariel was in a less stressful situation. Helena could tell that she was both sadden by this and eager to get to a place where the ceremony could be done.
Rachel and Helena were clones and, in theory, everything about them should be the exact same.
But that is only theory and often times theory dies in trials of real life. Rachel liked to use rainbow magic in her soul tie spells. Helena like to use knowledge, soul, mental, and health magics through her sorcery to complete soul tie spellwork.
As she was about to begin Ziahan spoke to her through their soul connection.
"Did you not ask me about being your soulmate because it was overly evident?"