Sugar High HYPER SWEET Tour | Seoul Special Guests | #SuHi Mikyung (Kyu's twin sister), Malia (Tristan's girlfriend), and Farai (Ivy's crush) were invited to the Seoul dates of the tour and attended in casual outfits. Tristan is Jiya's big brother. So his gf and his "gf" went to support his sister while he's in training.