Before
Nine items given faces
The same spot on the same Mac, photographed with Okigae quit and again with it running. Nothing retouched. Items you don't assign are left exactly as they were.
The row of icons along the top of the screen turns into a grey blur after a while. Okigae lays a character over the ones you choose. Click it and the app's own menu opens, exactly as before.
macOS 14 or later, Apple silicon
The same spot on the same Mac, photographed with Okigae quit and again with it running. Nothing retouched. Items you don't assign are left exactly as they were.
Give one to each item you want to pick out. Drop your own PNG into the same folder and it appears alongside them.
Momoka
Ruri
Konoha
Hinata
Akane
Sumire
Kuroha
Yuki
Himari
MiomacOS gives no way to reach into another app's menu bar item, so Okigae doesn't try. It lays a transparent panel over the item and lets clicks pass straight through. The real item is still there, still working, and quitting Okigae leaves it exactly as it was.
The panel's background is a capture of whatever is really drawn behind that item. On a see-through menu bar that's your wallpaper; with Reduce transparency turned on it's the flat colour. Either way it matches, because it is the real thing.
The settings window shows every item in your menu bar in one grid and every character in another. Click one, click the other, and it takes effect straight away. Items you leave alone stay exactly as they are.
The bundled faces are just PNG files in a folder. Put your own square, transparent PNG beside them and it turns up in the grid with the rest. How the bundled ones were drawn is written down in the repository.
Okigae isn't registered with Apple, so the first launch needs a right-click and Open instead of a double-click. It also needs screen recording access — not only to capture the wallpaper behind an item, but to tell the items apart at all. Without it, macOS returns no window titles and nothing can be identified.