"she relied on" ? The dude was sent into exile when she was around the same age the emperor started mistreating her, what are you talking about ?
Also the only thing shown about her past so far is how the emperor started mistreating her when she "failed" to awaken a power and she grew up isolated which is still true since her brother was exiled around the same age her mistreatment started.
You are nitpicking on the weirdest thing.
Exactly. After all, Rine was born with silver hair and violet eyes which are traits of people that awakened the ability, Emperor's Eye.
At a young age, her room was closed off and set with fire as per orders by her father the emperor in hopes of awakening that ability but as you can see it didn't awaken. She miraculously escaped from a closed room blazing in fire only for her father to ask if she awakened the emperor's eye. At that moment, she completely gave up on her father, besides her imprisonment was induced by the second princess who *spoiler alert* was a reincarnated person that read the supposed original story (it wasn't mentioned but implied) that Rine is the protagonist and she didn't like that so she manipulated the emperor using the knowledge.
Anyway, Chapter 103, why is the brother's power different from the novel?? It was supposed to be telekinesis but I guess that's fine, I'll see how it goess..

Nothing says “get ready for unnecessary filler and bad story telling” like pushing what a horribly sad and lonely backstory childhood the protagonist had, only to open the new season with, “but surprise she actually had a loving brother that was never mentioned or foreshadowed who cared for her and she relied on!” This character feels poorly planned, and is poorly executed/introduced and has entirely turned me off to this story. ¯_(ツ)_/¯