Today's Owain's birthday! It's unclear if he'll get songs written about him.
He got a Superior Bow, but it was quickly overshadowed once Nah casually found an Aversa's Night.
Dammit. I knew that yesterday was somebody's B-day. Oh well...
Anyways, Owain. The Sealed Sword that cleaves evil. Like all children characters, he's pretty much on the high end of the ability spectrum for that reason alone and his recruitment chapter is the easiest outside of Morgan's. Just by going with what he gets from his mother alone; in terms of classes and skills, he's got it made with the ability to either inherit Galeforce or Support Boost+ and a diverse class set consisting of the useful Myrmidon and Barbarian, and the not as useful Priest; in terms of stat cap modifiers, his mother does him no favors beyond taking up a vocation as a Priest or whatever he gets from his father. And speaking of his father, no potential father of his offers him the full 9 classes (outside of the Avatar, who goes above and beyond that anyways) alongside Inigo, Cynthia, and Noire. The best he can do is get sired by either Frederick, Virion, or Ricken, and of them, I would consider Virion to be his first choice given that he offers additional Skill and Speed to shore up Lissa's modifiers and it allows him acquire the Mage class to boost Owain's Magic proficiency and to gain access to Focus for an additional Crit+ skill if you want to lean that way plus he gets the Wyvern Rider class set which have great benefits of their own.
That said, unless you want a Morgan with the worst potential Skill cap, Morgan nor the Avatar have no real use for Owain.
Basically, he comes with a diverse, though maybe not the most useful, class set out of the box and can diversify into both physical and magical disciplines if he wants, but he has to fight against his mother's cap modifiers, there aren't many fathers that do him a lot of good, and the few that are probably want to be elsewhere instead. At least he gets his own exclusive legendary weapon even if its only slightly better than a stock Steel Sword (and if you know to send him to the right house during his recruitment stage or get lucky on the Regalia DLC).