（ﾟｰﾟ）?
Pondering Question Kaomoji
Doubt kaomoji — click to copy, then paste anywhere text works.
The eyes are drawn as wide rounded arcs, and the mouth is a straight line, with a question mark outside, giving a puzzled, open look. It conveys a neutral but focused curiosity, like trying to understand something odd. Works for asking for more details in a calm way.