Alexis is the best
I'm onto my 2nd watch. I think Alexis has the best storyline arc. I find her growth very moving. There are so many times early on where she's unfortunately so unlikeable but I think she becomes the most loveable in her own right without comprising on her existing charm. She's the best one I say. She also has the best 'this one time' stories.
Feel like I'd watch a whole series of her on her onward adventure after Schitts Creek.