Creating a changeling original character involves blending a few core elements drawn from folklore with a lot of imaginative personalization. The most classic power is shapeshifting, but I rarely see it portrayed as a simple, perfect disguise. There's often a cost or a limitation—maybe the form is unstable under strong emotion, or the changeling can only hold a shape for a certain amount of time. Some stories give them a tell, like their eyes never changing color, which adds great tension. Beyond that, many fics explore an affinity for glamour, which is less about physical transformation and more about weaving illusions, making people see what they expect to see. This can be used for everything from hiding in plain sight to creating elaborate, terrifying mirages.
Another common thread is a deep, often painful, connection to two worlds. The character might feel a constant, magnetic pull towards the fae realm they came from, experiencing it as a homesickness for a place they might not fully remember. Conversely, they could struggle with feeling like an imposter in the human world, never quite fitting in. This duality fuels a lot of internal conflict. I've read fantastic stories where a changeling's magic is tied to this in-between state—perhaps they can understand any language as a remnant of their fae nature, or they have prophetic dreams that blend human and arcane symbolism.
Physical traits often mirror this duality. Maybe they have features that seem slightly 'off' by human standards: ears a touch too pointed, teeth a bit too sharp, or hair that changes hue with their mood. Their true appearance, if they even have one static form, is usually described as eerie and beautiful in a way that unsettles rather than comforts. I'm particularly fond of interpretations where their power isn't just about deception but about adaptation—a changeling OC who can subtly alter their physiology to survive extreme environments, making them a resilient survivor. Their story is less about choosing a side and more about carving out a unique identity in the spaces no one else can occupy, which is where the most interesting character development happens.