Possible Clues:

• Pictogram that helps fill in emotional cues
• Smiley perhaps regularly found in Exmoor jail
• Heart Hands or Saluting Face
• Smiling Cat Face With Heart-Shaped Eyes, e.g
• Expressive online cartoon symbol
• Symbol such as Face Blowing a Kiss
• Exploding Head or Cowboy Hat Face
• Supremo jittery, hiding display of feeling
• Folded Hands symbol, e.g
• Japanese "picture character"