Allow me to sell you guys on my preferred TRF insight with some Hot TakesTM, as I am well known in the FoD community for my serious and engaging contributions to the discussion that 100% are never shitposts no siree
Thousand Ring Fortress Insights
[][TRF] Each scar is merely another ring in the making, from past pain arises new strength
First things first, there's the elephant in the room that needs to be addressed:
Rings. Rings are circular. Circles are similar to cycles, which are most excellent. By transitive property we can thus conclude that rings are excellent and everyone must vote for this.
QED that concludes my TED Talk see you guys next time.
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On a more serious note, this insight has a strong theme of learning from your mistakes, using them as fuel for further growth. It's about not shying away from previous bad experiences, turning their memory from a burden into benefit, and when combined with the lessons from Argent Mirror, allow Ling Qi to critically evaluate her past failures and regrets without falling into the trap of self-delusion. I can't understate how absolutely incredible this is not just for Ling Qi, but for any functioning adult! It's easy to be driven when things come naturally to you. No one is perfect, however - mistakes are inevitable, and for someone that's never experienced them, or doesn't know how to deal with them, they can be crippling. Life isn't smooth sailing - there will be obstacles, there will be trials, there will be times when your all just isn't good enough.
What truly separates the good from the great, however, is how you take those mistakes, those failures, and use them to become better than you were.
Reconnecting this back to the narrative, since Yrs is weaving the chosen insights into the writing of the upcoming arc (hence the early vote), I think this option provides a great opportunity for us to define in-story how Ling Qi's character will handle setbacks and learn from her regrets, with ongoing struggle of balancing the value of life with the weight of duty likely to come to the fore. It'll make for some fantastic reading, and I have no doubt that Yrs will be able to do the idea justice.
This insight resonates with me on a deeply personal level, and I truly, truly believe this is a lesson that Ling Qi needs to learn.