"you'll just have to find another partner. Someone strong. And smart. And brave! Someone who, though they act all tough, has a creamy center of gooey goodness!
This is how wander describe his ideal partner after he feels left aside from Sylvia in "the rider". I think this say a lot about wander and the kind of people he's drawn to. Wander obviously love kindness and selflessness. But while those things are fine on their own, wander is there for the chase. There's nothing more satisfying for him than finding the love behind a mask of hate. Nothing more cathartic than the vulnerability behind the power. Nothing more adorable than a grumpy though guy admitting that he care.
This obviously define wander and hater's relationship from start to finish but you can also see trace of it in his relationship with Sylvia. He still find himself squeeeing when she admit that she love him and need his help.
Tdlr: wander has a type: tsunderes
(this obviously apply more to skeleton dance but can you tell I'm biased?)
I had the thought that wander and Sylvia would definitely bath or shower together and then I pictured them as humans doing just that. If there's blush on their face, it's only because it's cute and I like adding it. I want to stress out that there's nothing sexual in this context. Some of my wander and Sylvia drawings can be interpreted as shipping but this isn't one of them. Just a casual moment between friends :3