Siyoon Profile & Facts Siyoon is a member of girl group Billlie under Mystic Story Entertainment. Stage Name: Siyoon (시윤) Birth Name: Kim Siyoon (김시윤) Birthday: February 16th, 2005 Zodiac Sign: Aquarius Chinese Zodiac Sign: Rooster Height: 170.5 cm (5’7″) Weight: 52 kg (114 Ibs) Blood Type: B MBTI Type: INFP Representative Emoji:  Nationality: Korean Instagram: … Continue reading Siyoon (Billlie) Profile & Facts