Just a reminder that Cassian lends Nesta, the consummate book lover, his favorite book, The Dance of Battle. And Nesta proceeds to inhale it and later discuss it with him, along with reading more books like it, when she realizes its subject is a common interest of hers too.
That alongside the sex and the training, these two also became friends.
(And you know the moment Nesta realized Cass left his personal copy of that book for her, some part of her was a goner, even if she did try to deny it for a while longer, bless her.)
King Arthur: [staring at his consort] You know you're not my manservant anymore, right love?
Consort Merlin: [humming] I know, but your safety is still my priority, that includes making sure your armour and weapons aren't rusted or tampered with.
King Arthur: [smiling fondly] Of course sweetheart.
Sea Captain Arthur: [looking anywhere but Merlin] Why are you half-naked again? Where's your breeches!?
Mermaid Merlin: [nonchalantly] They were too constricting and itchy however the tunic is nice. [Sniffs the tunic] Is this yours? Smells like you.
Sea Captain Arthur: [gulping down saliva and trying extremely hard to avert his eyes from Merlin's tantalising legs] Yes...
Mermaid Merlin: [nodding] Smells good. Well thank you for lending me it.
Sea Captain Arthur: [slightly flushed] You're welcome—you're still not going to wear the breeches are you? [Eyes immediately locked onto Merlin's thighs, his tunic fortunately long enough to cover Merlin's privates]