Ikuya Kirishima was the first-year junior high student who debuted in the second volume of the light novel High☆Speed! written by Kouji Ouji. He is the little brother of the club's captain, Natsuya Kirishima. Ikuya is a young man with greenish hair, orange eyes and long, black eyelashes and is a childhood friend of Nii Satomi, who was also the part of Iwatobi Swimming Club.