So, Sonic is the Knight of the Wind.

Blaze is a pyrokinetic.

Fire is this powerful, terrifying thing on its own. It surrounds and grows and is insanely strong.

But throw wind into the mix?

Wind takes fire farther. In a true natural wildfire, windy days are dangerous because it makes the fire spread and grow stronger and larger. Just the other day, there was a huge bush fire near my house, and guess what? The wind made the fire grow huge, it took days to calm it.

Blaze was perfectly capable and cool on her own. She was a good leader and an awesome person in general.

But it wasn't until she became friends with Sonic that she gained confidence. She grew as a person, and was better off for it. She was stronger.

Wind boosts fire.