@Frost
I'm going to go with Male, I checked out Chapter 6 and 7 which is about the time they crash the elf slaver wagon.
But I have some doubts as in ch 10 the Elf bought an adorable golem (which then is roasted with a fire spell by Imortale, immortal, emorel, w/e the translators decide her name is >.> and also the he/she pronoun flip-flop)
I can't remember anywhere else if The Elf or Cat Woman share a room (Inns) or it's seperate as they never share it with MC, but they could also prefer to just have their own rooms as well.
So I'd like to say Male, mainly from how the adam's apple is drawn, and the jawline is drawn similar to other male elves (that I seen) but that doesn't really mean "They are male" but it leans towards that.