Mira recalled the time in the Sky Realm branch of the Moebius Sect. She had been teaching future alchemists when Annabelle had come to her for some tests on isolation wards for production masters.
They had to completely lock out sight, sound, and aura but not deny entry of the elements naturally in the environment in case there was a need for them.
During that time a certain topic had come up as she looked at her currently passed out son.
{I am not sure he has noticed but when Lind makes barriers keyed to his aura alone, it also syncs with yours. I mean, you are his mother but it might be something subconscious. Weaving is far more intricate than formations after all and it is tied to the soul. Maybe I should bring it up to him?}
Mira had waved it off as she thought her son would have long since noticed and maybe it was an experiment to see how far he could stretch his restrictions so she saw no point.