Giselle is a Zainichi as her father is Japanese, and her mother is South Korean, making her ethnically half-Japanese and half-Korean.
She is fluent in Korean, Japanese, and English. However, she requests Japanese fans to only write to her in Hiragana and Katakana as she cannot read Kanji or Chinese characters. She can also speak pre-intermediate-level French and Spanish.
Whenever Giselle gets stressed out, she likes to go shopping and eat sweet foods.