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The ר was part of the vav - Word Extended Family as a ו extended with a horizontal on the top. It also starts it's own family. All members of this family are related to the as revelation.
[q 1][a 1]
↑The dalet is a commandment or the result of it. Though it reflects the personality of God, it does not contain it. You cannot dialog with it. The rosh is the revelation containing the personality of God.