feelingindicator

2. A chart or tool used to measure or track emotions over time.

The teacher used a feeling indicator to see how the class felt each morning.

3. A light or symbol on a device that shows its emotional or status state.

The robot's blue light was a feeling indicator that it was calm.

4. A word or phrase in a story that hints at a character's emotions.

The writer used 'trembling hands' as a feeling indicator for the nervous boy.