God Beast Beyhos was only a Nirvana stage Beast when the Star Monarch visited the Jade Nest millions of years ago. She wasn't even an Immortal, a sign that she wasn't that important to come under the radar of the Jade Ant Queen.
This was also why, when she and a few others hid in a cave during the Heavenly Court's coordinated attacks on the Jade Ant Queen, they were left untouched.
However, while those battles were indeed harrowing, the one they all felt the most was the battle between the Jade Ant Queen and the Star Monarch.
That day, she had just survived an ambush from another Calamity Beast and was barely dragging her body to safety when a shockwave blew over her.
It was the day she saw the Star Monarch, and since then, she couldn't forget his face. In fact, even after a million years had passed, she could still remember his face all too well.
Of course, it was only natural for her to remember him; after all, it was because of him that she awakened her bloodline.
