Leon isn't exactly socially anxious; he can interact with anyone. However, he really dislikes negotiating. Before he crossed over, his daily shopping trips never involved haggling, which is why he avoided small markets and mom-and-pop shops—places where not negotiating meant you'd be seen as easy prey.
Even for two people married, there should be clear boundaries regarding property. What's yours is yours, and what's mine is mine. Don't randomly add names to the deed for a house—much less between two dragons. Leon had acknowledged Tassera's status as his mate but never thought of her belongings as his own.
The shop that got robbed was hers, not his. Meanwhile, Tassera was quite headstrong in her personality. Leon helped her intimidate the Watchtower Port guardians of the Oasis City, experiencing firsthand what it felt like to threaten and wreck a city, all while keeping himself out of the fray.
