Iris is rarely afraid to speak her mind, as shown by her boredom with her job and open expression of disinterest toward ”boring” tasks as a Doll. She wishes to be given more interesting tasks, such as writing love letters to celebrities, which is what she thought she would do when she became a Doll. She comes off as blunt, short-tempered and dishonest, concealing her true feelings towards others. She is also self-confident as she notes that she is amazing and has what it takes to become Leiden's most talented Doll. She doesn't like making mistakes, which is why she isn't quick to admit them. She can get easily carried away and overly excited when she gets requests to write letters.

She sometimes acts and talks very impulsively and without thinking about the consequences, in which she lets her emotions get the better of her when she is upset. However, after realizing what she caused, she will apologize and genuinely admit her mistakes. She is also kind and caring for her close friends and family despite her fierce, sassy, and cold attitude.

Iris is a very hardworking and dedicated woman who doesn't stop trying until she reaches her goal; although she wasn't cut out to be a Doll, she worked non-stop to learn how to write in order to become a successful Doll. Iris also always admired the image of a working woman and has aspired to become Leiden's most popular Doll. She is very passionate about her job as a Doll, and she doesn't want people to underestimate the struggles of becoming one. She is strongly against giving up her work as a Doll in order to get married and settle down at home.