Wanted to contribute to
>>55632726, this is also my first time posting here. He's Leo, and he's wandering trainer from Sinnoh. I'll post more about him as I go.
>TQIt started with them wanting to prove their strength, and their bond only continues to grow deeper since. This is the kind of stuff what makes Mega Evolution possible. He lets his pokémon Mega Evolve because he knows Mawile can take the physical strain it puts on her body, and in return, she is willing to bear the pain, because she has faith in his judgement. If it's what it takes to win them a fight, they're willing to hurt for each others sake, and it's that trust that allows them to yield its brutal yet raw, destructive power.
Outside of battle, he certainly has a soft spot for her.