Asking your mother for prayer is the most natural thing in the world, isn’t it?
Not if she's dead, no. That would be unnatural.
Religious medals are worn for devotional reasons.
Any example of a Disciple or Jesus wearing medals, crosses or charms? Reading the Word of God, daily prayers and having faith ought to cover all of the bases I would think. That's the examples we are given.
Not all repetition is vain. "And the Lord said, "Listen to what the unjust judge says. And will not God bring about justice for his chosen ones, who cry out to him day and night? Will he keep putting them off? I tell you, he will see that they get justice, and quickly."
Not if she's dead, no. That would be unnatural.
Dead people don't stand up and shout. "After this I saw a great multitude, which no man could number, of all nations, and tribes, and peoples, and tongues, standing before the throne, and in sight of the Lamb, clothed with white robes, and palms in their hands: And they cried with a loud voice, saying: Salvation to our God, who sitteth upon the throne, and to the Lamb."