Description Is Not Identity
A paragraph of physical description tells a reader what a character looks like and almost nothing about who they are. Height, hair, eyes — three facts nobody retains. Meanwhile a character who always has ink on their hands is instantly recognisable and takes four words.
Visual identity is what people remember. It is mostly independent of whether you have art.
Start with Silhouette
If your character were a shape in a doorway, what makes them them? A coat too big for them. The way they carry one shoulder. Something they never put down.
Silhouette survives every medium — prose, art, a description in someone else's post — and it is the fastest way to make a character legible.
Choose Three Colours and Actually Keep Them
Not a palette in the design sense. Three colours you return to in description: what they wear, what they own, what rooms they are found in. Repetition is what makes it read as identity rather than coincidence.
Most writers pick a colour and use it once. The effect comes from the fourth mention, not the first.
One Object, Repeated
A ring, a knife they clean too often, a book they never finish. Give it a history and put it in scenes where it does not matter. Objects that only appear when plot-relevant read as props; objects that are always there read as belonging to a person.
Write How They Occupy Space
Do they take up room or fold themselves small? Stand near exits? Touch things while talking? This is appearance in the sense that matters — it is visible, it is characteristic, and unlike eye colour it tells you something.
Reference Images Beat Description
If you cannot draw and cannot commission, collect. Three or four images that carry the right feeling — a hallway, a texture, a coat — communicate more to a roleplay partner than a paragraph of measurements.
A gallery on a character profile does this well because your partner can look without you having to explain.
Leave Room for the Reader
Specify less than you think. Two precise details and a gap will produce a stronger picture than ten complete ones, because the reader fills the gap with something that matters to them. Over-description is the most common way a character becomes hard to see.