man i agree I dont rlly like this princess. Is it reasonable? Yes, but I just don't resonate with the attempts to characterise her, despite knowing what the author is going for. Hit or miss, I guess.
Iirc Sensei is hinted to have power to go back in time, probably this is alternate timeline sensei that emerged from timey wimey stuff cause it's soo cool sonuvabitch
Elena doesn't use the pill in the LN she gets an awkward lecture by shizuki and they return
The betrayal is more subtle too the dude doesn't attack he just "fail" to follow the other two and shizuki figures out why
Ice burial isn't the one to initiate the delay shizuki is actively trying to leave the battle and ice burial tells him he'll allow it if they go for a rematch the next day
During the battle Tiara doesn't get her sword back she destroys the hero purely with her skill and hand to hand combat,
The way the head maid learn about Tiara is because her opponent has no respect for fighters custom so she just launch a preventive strike at him, without the pre battle chant, which makes the head maid's dragon come out and ask what is she
Head maid and tiara heads back right away the ruins doesn't activate after the "hero" is killed by tiara either
Also we don't learn about shizuki having tiara's sword until a bit after
in the end the general plot stays the same but the events are from slightly to heavily different
That's not even the stupid part. She saw all that, yet kept the drug with her like it's a memento. Normally a person would have thrown it away or gave it to someone of authority LIKE HER SISTER as evidence.
Ah... Drama... with more contrived Drama as dessert. Goodie.
Only positive thing about this is that it's 7-8 chapters worth of Flashback compressed into one chapter. Author/Editor missed a beat there...