Behold, Kate: Season 3 edition (S1 version here)
It's basically just Kate but with more Horrors™️/j
Anyways, as you can see it wasn't too difficult to make this edit because not much changed! This design takes place after Varian is redeemed and they start talking/hanging out again. Of course this involves a lot of angst as they're both VERY guilt-ridden for different reasons.
Kate is still dealing with the aftermath of depression and finally getting to go outside again, and on top of that she feels like she can't properly connect with Varian- or more accurately, her subconscious self won't let her.
Also, if you're wondering how on EARTH her dress would be animated, simple answer: Greenscreen overlay ^^ Not sure if TTS does that. If not, and if her dress pattern is too complicated, you could opt for big polka dots instead!
If you noticed, her shoe-wearing position is a lot less awkward than her Season 1 form. This is because she's more used to wearing shoes from the time spent with Varian in season 1, and this season. Also her mother told her to wear shoes more often during the events of season two, which I'll yap about later. (which also has to do with paragraph #2 lol)