Sylph: Sylph’s are similar to witches but they manipulate their aspect in a more abstract way, with a focus on healing. They can manipulate their aspect to heal it, making it thrive in their session. A common way to do this is to manifest their aspect into others. They also manifest it into the world. Their aspect is something that’s fragile or flawed in their session, and they always take it as their duty to both nurture it and fix it personally.

Breath: Wind, freedom, particularly narrative freedom. Not being tied down. Going along with the flow of events, not being an obstacle to a story

Heavily reworded Sylph's description from the last analysis. Still makes mostly the same point but I think it does it more efficiently.

So, Breath, as short as it's description is, does mean a lot. It's the concept of freedom in general, and the concept of freedom within a story. John inheriting narrative freedom is basically the same as him having plot armor as a real power. Literal wind can be used to escape and travel wherever the character needs to be and also as a weapon. It's an interesting class because it's one of the few that's equally symbolic and tangible.

A Sylph of Breath would be in a Sburb session where there are extreme limits and restrictions put onto the players because of an issue stemming from a narrative force, most likely being something that went wrong in their game. The lack of freedom can be caused by anything if you get creative enough. Maybe they pirated Sburb and it caused major consequences (which is an idea I had at like, yesterday, probably been done before or at least joked about). A fitting way to have a lack of breath within a story would be if the characters were just in a glitched or null session. Doesn't have to be that they're lacking a space or time player, could be a rogue NPC that kills all their dreamselves or kills the Black King and Queen before them, or a really bad coincidence, or interference from a powerful force outside their universe, like an Ult level player or a Lord. Or maybe even an evil Muse?

Anyway, if you're wondering why it's taking so long to get to explaining what a Sylph of Breath actually does, it's because it's one of those classes that's heavily influenced by the universe around them and the story they're a part of. People could relate to the struggle of a Sylph of Breath if they feel like the world around them or the systems in it that they're supposed to be able to rely on always seem to be plotting against them. Or if you feel like god themself has a grudge against you and the people you're close to, or maybe just the people you're close to. Things keep happening that keep you from feeling like there's any freedom in your life, and it's your biggest goal to carve freedom out for everyone, to try so hard to fly that you can eventually go anywhere you want.

Their actual powers would be similar to Johns but not identical. They wouldn't have very strong combat abilities, when they're fighting with others they'd take on a support role, using wind to push enemies away or to get their allies out of harms way. The way the metaphorical and literal wind works in John's favor when he just needs to go somewhere, how he always gets to where he needs to be, would be something that a Sylph of Breath could manifest for others, and you can elaborate on that concept in whatever way you feel would work best.

If whatever issue is causing the narrative to be weakened is a person acting out because they feel like they don't have any freedom themselves, a Sylph of Breath would heal them, no matter how much harm they've caused. However, them being able to heal breath may not come from something they do with their literal powers, it could just be because of the things they do in the story outside of using them. I hope no one's tired of me repeating this but I'll say it again: Classes determining specific powers of a hero is secondary to classes determining a heroes role in the story and how they interact with a specific narrative concept.