My Senior Sister Has a Terrible Affliction: Occasionally Wicked, Frequently Unhinged

(Not many readers, so there aren't any ratings.) Xiao Ling died young and unexpectedly transmigrated into a deranged cultivation novel where the entire cast sacrifices themselves to help one person ascend.

With everything stacked against her from the start, she remembered the rules for staying alive as a disposable background character who transmigrates into a book: don't pick fights unless you're sure you can win, don't play a hand you haven't figured out, and keep as far away from the leads as possible.

But fate had other plans. The absurdly self-assured male and female leads refused to let the plot move forward, so they drew their swords. “Hello. Let us kill you. This is an order, not a request.”

Xiao Ling, in her frail, pitiful, helpless-puppy era: “...New account. Leave me alone.”

She opened the original owner's life record while clutching her boxed lunch, then went dizzy and saw black spots.

The leads shed clothes everywhere, and she takes the blame when they dual-cultivate.

The leads don't want her alive, and the highest secrets of heaven forbid her from speaking.

Master: “What kind of nonsense is this? Let me write it.”

Water of the Heavenly River naturally counters Heavenly Fire; she overcomes every obstacle.

Eldest Senior Sister: “Sounds fun. I'm in.”

She takes the peerless opportunities, and never has to draw talismans by hand.

Second, Third, and Fourth Senior Brothers: “Since Senior Sister's joining in, so are we.”

She sharpens her knives and chops away, then flips the table when Heaven's Will tries to serve her a dish.

Sixth Junior Sister: “You're all writing? Then I have to join too.”

She tramples every rooftop and hillside, while her partner keeps a widow waiting and slips under the covers.

Seventh Junior Brother says nothing, and only makes things worse.

Her partner is reborn and avoids her; her partner forgets she exists.

Xiao Ling, in her healthy-minded border collie era: “Wait, did something weird just get mixed in here?”

*There is romance. The heroine grows over time and isn't the kind of big female lead who rejects all love and desire. The villains come in every species and gender.