After Everard vented out on Ruby and said all those hurtful things, it took him a few days to calm his mind and think clearly. And when he did, he despised himself for hurting the only person who genuinely cared for him.
When he realized his mistake, Everard had gone to look for Ruby in her room. However, he didn’t find Ruby there. He didn’t think much of it that day; he simply thought that she was somewhere around the castle and then came to find her another day. But then the same things happened. He couldn’t find Ruby no matter where he looked.
After mobilizing guards to find her, he finally realized that Ruby was gone from the castle for good.
He kept on recalling everything that he said to the poor thing. And he hated himself for it. He hated himself even more when the guards couldn’t find Ruby outside of the castle as well.