The ghost of Charles Dickens laughs at your fantasy writing guides. He’s noted for naming characters to fit their personality, and he’s considered one of literature’s greats.

https://writingcooperative.com/to-m...mes-from-the-master-dickens-3a417ab8b721

If you want a fantasy example, look no further than Merry and Pippin.

Does Gale specialize in air magic anyway? You only mention a couple of spells out of many. Without a clear tendency for air magic, Gale is just a name.

I see no reason not to have some names sounding like or even the same as real world names. It’s not exactly uncommon. It would only seem weird if it was overdone.

Avoiding iconic character names from other universes, methodology or the real world is obviously best avoided. But Raphael the painter isn’t recognizable as a character, only a name (and possibly a face from a self portrait), and the angel barely plays a bit part in the Bible. It’s not like putting a Han Solo or Moses in the story.

These guides are probably just to give novice writers some things to think about. They aren’t really any rules to this.

Basically this is all a bit of a stretch, with the exception of Shadowheart, and I strongly suspect that’s not her real name anyway. It was probably either given to her by her sect, or she chose it herself because she’s a bit of an edgelord. It’s just a shame there didn’t seem to be an option to laugh at her when she introduces herself.