
Yeah- I agree. She definitely needs to discover the root and seems to be on it, becoming the family head and all to open the sanctum. I feel bad for her. I mean it was implied she snapped at one point during one of her regressions. Honestly anybody would go insane if you experience decades of torment. It could be even counted as a century since she regressed 7 times...

It's definitely not a century, she didn't come back as a baby and grow up all over again in her 7 lives, it's stated in chapter 2 that she's back to that moment where the monster attack her in the garden, like a checkpoint in a game, she wasn't reborn, she only respawned, and she died again not long after the respawn, maybe just one year or two years?
Idk how old she is, but let's assume she's 16? So 16 years for her first life, and maybe 2 years at most for the rest of her each life so 2x6 = 12, most likely she lived for 28 years, more or less, not a century
i like how we don't know her motivations she already got her revenge in her previous life