* It's primarily an adjective describing sensitivity. The concept of being "more sensitive" or "most sensitive" doesn't quite fit the nuance of "touchy," which implies a tendency to be easily offended or upset.
* There are more specific options. If you want to express increasing levels of sensitivity, you might use:
* More sensitive
* Most sensitive
* Oversensitive (for a strong degree of sensitivity)
Instead of trying to find a direct comparative or superlative, focus on the specific aspect of "touchy" you want to convey:
* If you mean easily offended: use "more easily offended" or "most easily offended."
* If you mean easily upset: use "more easily upset" or "most easily upset."
* If you mean over-reactive: use "more over-reactive" or "most over-reactive."
Remember, the most important thing is to choose words that clearly and accurately communicate your meaning.