Yeah, Magil in RD is more like Magus, but there's still something odd.
He knew Riddel before, because of his strange reaction when he sees her portrait. Although their relationship is only metioned in certain scenario, but in the main story line, he still acts strange when seeing the portrait and the way he talks to Riddel proves he knows her somehow.
If you asked the mirror about Magil's past, you will know he and Riddel are probably know each other when they are very yong, I know that's optional, but you call invoke this in the main story line. Or maybe that little girl is not young Riddel, in the main story line... but that gives us a feeling Magil lives in that era since his childhood, unless you believe the scene reflected by the mirror is somewhere in Kingdom Zeal.