I think you’re right…
In my experience, it would pull away. If you do a soft fuse, it MAY work, but it may be easier in the long run to recut it.
Another thought is to put the orange “C” under a piece of clear and full fuse. You’ll need a long bubble squeeze, and it might be a good idea to fire in on fiber paper and thinfire (both), but it would keep the C intact, I think, and give you a cool “underwater” effect.
Let us know how that turns out…and pictures!!