I thought Chardal was mustard 🙂
I actually agree with Gavra Raba, that someone who is trying to grow is a Yarei Shomayim. The question asked about a Charaidi, which may depend on dress, occupation, lifestyle, and location insead of actual “shake(ing) in their boots from the word of
G-D” (as per the poster).
In E”Y, I would think going to the Army/Sherut or not is a good indicator.