Do these people really have the power of magic?

Magic doesn't exist. Gods don't exist. Prayer is an exercise in doing nothing while pretending you're doing something. I don't mean to be harsh, but that is the ugly truth. Being born or married in to a royal title or adopting the tenets of a church does not give someone special powers. Mother Theresa was a woman who had good intentions that were destroyed by reality. She may have started as a Catholic, but she died at best an agnostic. Princess Di was a gracious woman who married in to a life for which she was ill prepared. Queen Elizabeth is the titular head of a government, but she doesn't have any effective power. She is at best a rubber stamp for Parliament. The only power they have or had is what we have given them or that power innate to whatever money they possessed.

i dont know, for sure, but Pres Bush jr said he received a visitation while president.

magic can be real and there are ways to bind a person to a spell. but realisitically, if God is protecting anyone, there shouldnt be any power over a saint. i dont know how, when i myself have been in tribulation for a few decades.

its the first thing i learned as a new believing christian, and i still dont have any way of relying on god for protection except in repentance and prayer, when asking for it.

No. Prayer doesn't magically work for anyone. It's just placebo and confirmation bias.

There prayers are meaningless if they are not done in humility and repentance and faith in Jesus Christ. There position in society is meaningless. God is not impressed with celebrity or renown.

And Princess Diana and Mother Theresa are dead, so they cannot pray for you or your family.

Two of those people are dead, so you're not going to meet them.

No their prayers are no holier than yours, and God isn't paying attention anyway.

maybe Mother Theresa, but the others would probably be the same as any other person praying for you

God, no, because they are mere humans, after all, dude.

No.