Tonight I want to talk about Mari's hair. Mari has full orange hair that is chest-length. Because she is a Sister, her hair is normally partially obscured by her habit, but she manages to use her fringes to her advantage in this regard. She puts some of the back of her hair to her right side, putting it into a short braid with a metallic hairbind of some kind (I am unfamiliar with this type), giving her a very traditional look. In her track outfit, her hair is free, and is shown to be somewhat obscured while under her habit. She wears a white hairband, but also wears her corsage, showing how important it is to her. Interestingly, she normally wears the corsage on top of her habit in her normal clothes, but that might just be something she figured out she could do. Her hair is tied into a ponytail behind her, but her fringes are still long, at shoulder-length. This is likely close to her natural hairstyle- healthy and straight hair. Her idol outfit is actually a very nuanced appearance compared to normal. She wears a lot of darker colors, which is similar to her attire as a Sister, but her hairband is also black. Not only that, but she wears earrings, along with a ribbon choker. Her hair takes a more curly appearance in this outfit, likely to help provide width and balance for her. It's something where only upon closely looking at iMari compared to how she normally presents herself reveals something inexplicable, a hidden message within. Make no mistake, she's mentally still pure, but there's definitely something that can be seen by some that might reveal something else there.
Mari takes very diligent care of her hair as she does most other facets of her life. Assuming that there's individuality allowed in hair products, she strikes me as the type who would pick "pure" flowers as her scent of choice. Pure, calming. Something to help do her part in making the Sisterhood appear friendly and peaceful.