During an episode of SBS' Strong Heart that aired on November 22, 2011, Sunye announced that she was in a relationship with a Korean-Canadian boy she met in Haiti during a missionary trip.
In September 2010, she made a visit to an elderly man who had secluded himself in the mountains after being a victim to many cases of fraud.
According to the producer that followed her, "Sunye prepared clothes, shoes, a radio, food, and various other presents for the man.
He hasn’t been able to wash in a while so there was a very bad stench coming from him but Sunye paid no attention to it and held his hands tightly, asking him to live a long life.
She also prayed for his good health." In the fall of 2007, prior to the Wonder Girls' promotions for their single "Tell Me," Sunye's grandfather died.
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Forgive me* @Apinkpcr @Apinkhyk @Apinkkohy @Apinksne @APINKKNJ @Apinkbm Ukiss Lee Kiseop: @kisseop91 Jaeseop (Or AJ?
Sunye has contributed her vocals on the tracks of various Korean artists, including Mighty Mouth's "Energy" and Park Jin-young's "Afternoon Separation." She recorded the single "Maybe" for the soundtrack of the popular KBS Korean drama, Dream High.
Sunye and her band mate Park Ye-eun collaborated with her Jo Kwon and Park Jin-young to perform "That's What Friends Are For" on the KBS program Yu Hee-Yeols' Sketchbook.
In October 2009, her father was rushed to the intensive care unit after his condition turned for the worse.