Let's write!

 ( Apologies if it's not the best.   I used the example)

He's called the Master. The first thing Tegan notices is his smugness.  There's something about him...that beard or that attitude.  Or probably a combination of things. Either way,  she senses something about him she can't trust.  That business with her aunt confirms every suspicion- he's truly dangerous.

Nyssa recognizes him, all too well.  She can't forget what he did- and seeing his face again is only a haunting reminder. She holds that desire for revenge deep, but can never bring herself to act upon it,  He's ruthless, destroying whole civilizations. But acting would mean losing the only part of her father she has left.