Rgul most likely served the rest of his days as a wing leader then quietly retired. Hed no shot of ever regaining his position with Hath being so much smaller than Mnementh. I remember Menolly did return to Half-Circle to see Alemi and ask him about moving to Paradise River but I dont see her ever speaking to her parents again. I do recall Alemi having some inner monologue about how their parents never brought her up and basically pretended she didnt exist.