Hey! Thanks for the feedback and praise ^///^
Fortunately, Wayfinder is not like the other girls, you're never locked in to a choice for your wolfboi!
You'll get a day (or two in some cases) after making a choice, the story paths will diverge to the different scenes, and then converge to the main story path again until the next choice.
Choosing Arkyn won't lock you in to his story content permanently for the playthrough, or you could choose him every time he's available! Entirely up to you!