[Crossover] How One Person Plays Multiple Roles in Front of the Original Characters

[Updates may follow the rankings for now. Please be kind~v~ Comments are open with no restrictions, so feel free to speak your mind BVB]

To survive, Qing Niao, a high school freshman who died suddenly by accident, has no choice but to bind herself to an unknown humanitarian aid System. From then on, she begins a journey in which she plays multiple roles.

Humanitarian aid means more than simply "providing aid". It also includes "punishing" people.

The System automatically identifies creatures' good and evil scores and issues missions accordingly. Qing Niao must complete each mission within the allotted time.

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Secret identity 1: Jujutsu Kaisen's average, unremarkable lightning-type student, the "Child of Natural Weather" Saito Baige [Back of secret identity card: Unknown]

Secret identity 2: Katekyo Hitman Reborn's quiet, taciturn classmate of the main cast, human walking armory Handa Nanjue [Back of secret identity card: Unknown]

Secret identity 3: Bungo Stray Dogs' sparkling, lively newspaper delivery boy, all-state monitoring psychic, an externalized magician from an inner world, Hechuan Liren [Back of secret identity card: Unknown]

Secret identities 4 and 5: Gotham and Metropolis's twin stars, working odd jobs everywhere, Batman/Superman's gene clones. Extreme-development human body, pure martial arts fighter Liam Huo Ke / extreme-development Kryptonian superpowered being Forken Huo Ke [Back of secret identity cards: Unknown]

[Main plot in brief]: Defeat villains from different settings and take down their towers one by one. For some reason, more and more people gather around each secret identity along the way. As Qing Niao marvels at it, she discovers a whole line of their friends' allies following behind her too: "... ?" But she's undercover :)

Reader's guide:

@ Focuses on friendship, family, plot, and character growth / no CP, no romance or flirting / identities are never exposed

@ The secret identities appear in rotation. Every identity is one of the protagonists, with a complete storyline in their own setting and a main plot centered on the protagonist, Qing Niao.

@ The story includes reincarnation through the Six Paths. Those who end up laid out after the protagonist's actions haven't truly died in the conventional sense (...), but are living in a different way (?). Villain fans, beware.

@ Many original criminal cases (the average power level is roughly equal across settings, so no steamrolling).

[I'm told I should leave a paw print to avoid accidental trope overlap, but I forgot the exact date. Started at the end of May.]

Theme: Finding the right direction at a crossroads where you've lost your way