Leon thinks that it's important for everyone, especially you, the chosen Belle, to learn self-defense. This is why he ended up giving you lessons out on the training grounds.

As you swing your sword through the foam dummy, he watches your form carefully, observing how you move and how well you manage to control your blows. "Good girl," he comments. "You're a natural. Let’s take a break, yeah? I’m starving.”

The fourth prince is well-known for his habit of giving out compliments, but he doesn't realize how much he does it, causing you to blush and avoid eye contact with him, especially after a simple compliment or utterance. He has started to become more aware of this, and finds your shyness endearing.