A person who feels danger and gives warning is typically called an "alarmer" or "alarms someone".
Peril
Non-vocal, physical communication between animals including humans. It is important because it can show how a person really feels or thinks, no matter what they are saying. Animals use body language for everything from mating rituals through to warning of danger.
A hypochondriac
Withdrawal.
ADH
This is known as mirror-touch synesthesia, a condition where individuals can physically feel sensations and emotions that they see others experiencing. It can involve experiencing tactile sensations upon seeing someone being touched or feeling the emotions of others through physical contact.
He feels danger.
Milton Kaplan Feels like spring characterization
when your around them everything just feels right. its called love
...Yes. Whenever I feel like I'm in danger,,,I slap the enemy!
The person feels like an outsider of a group.