"It's a health rune. Keeps things running and boosts my immune system."

She doesn't specify what those "things" are, but the top of a scar going down between her breasts should be fairly noticeable with her shirt partially open. A surgical scar. After a moment she pulls her shirt back together and starts rebuttoning it.

"So if you want to make a new glyph, maybe you need to think about what old glyphs are related and try to build a new one off of it. Kind of like making a new word based on an old one."