Irène recently evolved and started teaching in Kalos Miare straight after graduation by recommendation and unwittingly applied to do so. In her studies back then as a student, she favours studying in different languages as a challenge and ended up learning several of them in the end without her knowledge on being sufficient at it.
Either being inside or outside of class, she is a nice person it interact with if they can keep up with her shy attitude. She can be easily flustered and easily frightened, which makes it rather difficult to discipline her students and has a hard time enforcing rules on her own.
Though born in a peaceful town of Kanto, she has lived most her life outside out it due to her parents moving on to Kalos, thus her name is set as such.