Research And Planning: Character Qualities

In my trailer, I need 3 actors. These will consist of:
* A Doctor
* The Villain
* The Victim.

I have a vague idea on what I want each character to be like:

Doctor:

• I want this to be played by a male. 
• I want them to be middle aged.
• Quite tall (because of the costume)
• Preferably one of the teachers from college. 

The Villain:

• I want this to be played by a young female character. 
• Must be enthusiastic.
• Must be outgoing and be OK with experimenting with costumes/ make up/ the acting.
• Must be able to use their time outside of college hours.
• Preferably has dark long hair

The Victim:

• I want this to be a female character also. 
• I want her to be a teenager so that the audience can relate to her. 
• Must be enthusiastic and up for a challenge. 
• Must be able to have free time for filming. 
• Preferably has an interest in the idea. 
• Should be confident on camera.