invisible
When a character is completely transparent and cannot be seen by either the viewer or another character. Their clothes may or may not be invisible as well.
If a character is not fully invisible but instead partially transparent, then tag as transparent. If clothes are partially transparent, use see-through clothes.
Not to be confused with invisible man, which does not refer to male characters who are invisible as part of their design, but is instead a convention of drawing generic anonymous/self-insert men in sexual scenes as transparent silhouettes.
Examples
