You should always trust your instinct and feeling about a person especially if it’s negative. That’s when you have to be watchful for sure and if you are deciding to get into a situation in their proximity or presence ,then you certainly should not , if your feeling tells you otherwise.
Commonly gut feeling and intuition are not meant to be taken as only compass or medium to consult with before you get into a potentially risky or dangerous situation. They can be supplementing little tools for that but your decision should not be based on them. Once you are in the bad situation say one that you could not foresee or that happens randomly then you may not have anything else but you intuition and feeling to navigate yourself out of it for those usually rely on them very much and tune in as you make rational decisions and let those be your guide on your compass for sure. But not the other way about. The more serious a decision or the more potentially dangerous it could be you must go by your common sense intellect analytical skills on the go assessment and you can check with your intuition if this is all a rounded and harmonious decision you’re about to make cuz sometimes it can happen that you have thought of everything and it seems like a great idea and all factors are vetted and still it doesn’t feel right if the feeling is strong enough to alert you you should probably also listen to it if you can and if for some reason you cannot easily you must always be ready to change your plan.