siblings
100

who is sisters in Guardians of the Galaxy a.k.a daughters of Thanos

Gamora and Nebula

200

who is siblings in Black Panther

T'challa and Shuri.

300

who is thor's siblings

Loki and Hela

400

who are twins in Avengers: Age of Ultron

Wanda and Pietro Maximoff

500

who is siblings in Guardians of the Galaxy holiday special 

Mantis and Peter Quill

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