Did a challenge of my own (might already be a thing) but I did a Night and Day of my Oc Nina as well as a Genderswap on her as well as Daniel from my comic SweetEscape on webtoons XD

Nina with hair up (Day: org form/look) & next is (Night) Nina

Also the genderswap of Daniel w/ a few tweaks

and a genderswap of Nina

Which then turned back into Daniel