The Smile Entity would kill us.

King Boo is the least likely to kill you and the most likely for you to be saved due to it being a Mario game, whereas the others are either way more likely to just kill their victims or are just straight up Gods.

I would not want Bill to go into my mind and look at my search history. 😳

Hmmm... let's see... five of these guys are currently under the Pure Evil status while one is not.

Guess which one I'm picking?