Characters from Concord (and Dustborn) were made and designed to look ugly on purpose, they were trying to be unappealing.
Meanwhile Ivy was designed to be a gargoyle, a stone monster, she is not supposed to be pretty but they weren't aimming for her to be ugly, is just that gargoyles are monster creatures that don't look pretty… for the most part, we don't count Goliath.
But yeah, I think she looks cool!

I'm amazed that I like her design way more than I like the designs of any character in Concord.