Responses
She's using her brother's name (the letter he sent her called her Hitomi, but she is going by Subaru in school) but they recognized her by her last name (the kanji are apparently right next to each other. it's the equivalent of someone named Smith reincarnating as someone named Smithy in english).
I've only read the first two chapter's so far but I'm really confused if she is using her name or her brother's?? Because she's meant to be impersonating her brother for a year it'd make sense for her to use his name, but then she's having memories of her past life - so did she use her own name or her brothers, or did those boy's only recognize her from their shared last name...? (I'm so confused ╥﹏╥)