To be honest, Roy didn't feel much when he first learned about Lilith's authority. But now that he saw her attack Michael, he realized how powerful and terrifying her authority was.
All life in the Infinite Worlds couldn't escape reproduction and birth. This was the most important link to the continuation of life. From this, it could be seen that Lilith, who controlled this authority, was probably second only to the Creator!
Although Michael appeared as a male, in fact, angels with bodies of holy light didn't have gender differences. But Michael, a twelve-winged Genesis Archangel, was actually tricked in front of Lilith and forced to undergo a mitosis-like 'breeding' process.
Roy now knew why Gabriel was so timid when facing Lilith. And when Michael and Lilith were arguing, he was still trying to stop Michael… This might be because Lilith had taught him a lesson in this way when he provoked her in Eden…