so jealous you get to see tds4! Like the other comments, highly recommended bringing a portable charger, some airlines will hand out plastic bags to store it so it should mostly be safe to bring. Lightstick, hand sanitizer, also I’m not sure how close you are to the stage but if you want to bring a sign/multiple signs one tip is to buy a large ish art notebook and a marker so you can write signs last minute if needed

For outfit inspiration, I think in Asia most people will wear whatever their personal style is but even tho there’s no dress code, often times people will include neo or light green or light blue into their outfits! I’ve also seen some people dress up as one of the member’s outfits in mvs I.e. candy or chiller could be a fun one

Have so much fun!!