Leonardo
He will usually make up excuses for you both to leave so he can avoid a conflict unless necessary.
Donatello
He will go up to you and him and will politely ask them to leave before saying that you two should leave and leaving with you.
Michelangelo
He will come up and will start making a ton of jokes to annoy the person into leaving.
Raphael
He will come over and show you a bunch of affection so the person will get uncomfortable and leave.
April
She will usually try to stay on the side and watch to let you handle it on your own because she wants to trust you.