Yui Aragaki was born as the daughter of the youngest of three brothers who are all women. His career as a model started from the audition photo model fashion magazines Nicola who participated in 2001. Yui's sister asks participants to attend the audition, and it won first prize. After that, he continues to be a model for a number of fashion magazines. Until the end of his career with Nicola magazine in the spring of 2005, Nicola's face graced the cover of the magazine 15 times. Nickname "Gakky" acquisition of actress and model Ayako Enomoto, and not as a model Nicola magazine.