One comedic yet hypocritical take that (I think) the devs can do with Cú’s relationship with his wife is…he gets ironically jealous to a degree/possessive when Emer interacts with other guys in Chaldea.
Oh, it gets worse when that guy happens to be a certain Archer (you know who that is). THIS ONE IS A DECLARATION OF WAR.
it's such a missed opportunity that no one ever brings up how in the end of f/ha, Bazett and Caren basically have a servant custody battle over who gets to own Angra and Cu
Emer, the fair daughter of Forgall Monach, is approached one day by a knight in blue. His eyes regard her with such warmth--what could he possibly want?
The day Cú acknowledges that he does have (some) regrets with the way he lived his life, gets summoned as a Saber, and have a nice Master to pair up with him; is the day we might see him as the main character/Servant in one of the Fate series…