Heyo, so this is how each personality would handle having to execute someone =)
ISTJ: I have completed and filled out all the paperwork for your execution.
ISTP: Dammit, I told you I wanted to know about this sooner so I could do a test run of the new firing squad guns I ordered.
ESTP: That's a shame, buddy. But hey, I hear your jailer's a real looker. Don't suppose you could get her number for me before you die?
ESTJ: I've checked the local statutes and spoken to the authorities to ensure your execution can go forward as planned.
ISFJ: I promise to look after your children.
ISFP: I'm going to make a collage in your memory.
ESFP: We can do it with a pirate theme! I'll go get the balloons!
ESFJ: Oh! We can all go out for dinner for your last meal! You like burgers, and I hear there's a great place just down the street!
INFJ: Your execution will teach others a valuable lesson.
INFP: I am so sorry to hear th- hey, look- a butterfly!
ENFP: Hey you; pretty one over there. Go kill that guy for me. Please.
ENFJ: We'd like to execute you. If that's alright with you. Is now a good time?
INTJ: I cannot comprehend why someone hasn't executed you yet.
INTP: What a cool guillotine
ENTP: If you need killing, let's test my new Executer 4,000 to see how evenly your body fries.
ENTJ: Unfortunately for you, you have to die. Now hurry up and don't dawdle, you're not the only one I have to kill today.