Two Options

This purple puppy was none other than Simona's companion from all those years ago. All this time, Leonel had kept it in a snowglobe because he hadn't had a chance to give it back to her.

Back then, Leonel and Aina had found it in the Rapax Nest, but not wanting to deal with a beast they weren't familiar with in battle, chose to put it away instead. By the time they met Simona again, they were already in the core region of the Rapax Nest and things were too hectic for Leonel to care about such things, especially considering the appearance of the Three Finger Cult had left him completely infuriated.

Then, when they exited the Rapax Nest, Leonel was heavily injured and once again had other things to worry about.