Here's Kirishima's costume as requested! If you want to be Kirishima without his costume, you can use the UA uniform, found here. Also, I couldn't find a good mask, but experiment with what you think fits best! I also used the red gym shorts and black stockings to kind of mimic his outfit's red and black. Hope you like it!
Pants: Red Gym Shorts
Socks: Black Stockings
Shoes: Steel Toed Boots/ Black Rain Boots
