Julien Kang

Daniel Dawson/Shizuki Claude Ashiya, Jae-hee's caring older half-brother who works as a doctor. Although Daniel is adamant on taking Jae-hee back home after discovering what she did, he eventually relents and allows his sister to continue to study in Genie High

Kang Gu-ra - rival fighter to Seung-hyuk

Alex

Joon-geum's fan

Gary Jung, a golfer hired by Jay Park to play Mi-soo in an unusual golf challenge

Joe (ep. 7)

U.S. Marine Corps Platoon Leader

"David"