My elder female cousin used to be my idol.
She is 5 years older than me, she seems didn't study hard, but she could get a top score among students. She used to be very introverted and nervous, but she jumped out her comfort zone becoming the monitor and made a lot of friends.
As her little sister, she was like always ahead of me and led me. I dreamed to be an excellent student just like her.
Nowadays, it's hard for me to name an idol any more, because I value my own thoughts so much and I rely on myself. Having an idol or not, I still know well about myself: which I can do or which I can't. I would say the impact of having an idol is decreased for me as I have become an adult so many years.
I don't have an idol in life now, but there are many people I show my respect and look to them. I think people is not perfect, but there is always some aspects I can refer to as a role model.