Normally to determine if someone is not cruel and worth being near in general I invite them to a nice restaurant. Then I let them handle most of the interaction

Normally to determine if someone is not cruel and worth being near in general I invite them to a nice restaurant. Then I let them handle most of the interactions with the wait staff. If they are rude or jerks to people they have authority over I stop interacting with them. Thank you for saving me the price of a meal with having to vet you.