DC: A Lonely Habitat and a Blue Mountain Vireo

Batman was out on his usual night patrol.

A young vigilante in a blue-and-white uniform and the Bat-family's classic domino mask dropped from the sky, deftly completing a four-and-a-half turn in midair before landing steadily on an air-conditioning unit. She found herself face to face with Batman and Robin.

Pretty girl: "...Hi? You can call me Bluebird. Sorry, I got the wrong world. I'll head somewhere else right away... Ah, wait! No, this is the right place! The coordinates are correct!"

Bluebird, aka Josephine Grayson, is the legitimate daughter of Richard Grayson.

That night, the Nightwing ex-girlfriend alliance...

Dick Grayson: "I don't know! Wait, why is she Bluebird? I wasn't even Nightwing in that world, so why did she go and become Bluebird!?"

Josephine, with dramatic emphasis: "Who am I? I am whoever you need me to be. Bluebird sends you her regards."

"Also, my dad is probably trying to cross worlds and come break my legs," the girl said, rubbing her chin. Then she put her hands together. "But it doesn't matter. My dearest guide, the best third uncle in the world, will definitely stop him."

Nightwing's gaze fell coolly on Red Robin.

P.S.

1. Josephine is Grayson's daughter from the Solitary Habitat storyline. There's a reason she became Bluebird, Ficedula, and it is indirectly connected to a certain time-hopping flying duck.

2. Gotham will get better. No love for ugly people!!!

3. Josephine is underage, but this is [Everyone Loves Grayson] 2.0. The adult Bluebird is a sincere, natural heartbreaker. (You're all my wings. (Where on earth does this inexplicable competitive streak come from?))

Theme: We all deserve to be treated gently by the world.