The image says which one of those characters that will protect you while other 8 characters attack you. It means which one of those 9 characters shown in image that you wanted to be save by.
At first, I believe Death Note is the strongest because he can write down any real name in the book and 30 seconds later the person is dead. But I saw T-800 Terminator and other robot and it's impossible for Death Note to write down its name. I chose Wolverine because he can kill them with claws. That's why I choose Wolverine.