I never really found a use for Wanderer, ever. I'd just use Kirara for her superior climbing skills in very tall mountains, Kazuha for short climbs, Yelan C1 for flat ground...
...and now Xianyun C0 does all that with her skill.
Seems Arlecchino's charge hold ability is pretty much the same thing as Mona's alternate dash, except Arle hovers over the ground and you can still dash normally.
This is my new wife. It's Schrodingers Wife. As long as the box isnt opened, I can continue having multiple possibilities for my ideal wife!