That was a tricky one! Here's the foxtrot
comic. I needed a little help because I forgot what his sister's name was, but the rest I was able to unscramble with my
Unscrambler program =D. The word's unscramble to...
Paige
Displays
Abnormal
Stupidity
The key letters are then: e pl no t
Unscrambling those letter yields
lepton, which is a type of particle.