it's kinda strange, but the more i see her second brother from her previous life the more i think he is a tsundere who somehow cared for her
like, every time he talks he sounds like a jerk but he also beat up the people who hurt her, and this time he staied up waiting for her to eat by herself some bad for to tell her (in his rude manner) "if you don't like this food, come eat with us"; so he basically was trying to force her to join the family for dinner
now this is all crap made with some good intentions, cause he avenged her and tryed o include her, but he never wondered WHY she got bullied and she didn't want to eat together
(because she was part of a rich family which didn't seem to care about her at all, and maybe some more which i don't know)