Okay hear me out
Gravity Falls and Frozen
Stan as Anna and Ford as Elsa.
An accident happens in their childhood that causes their dad to separate them. They reunite later in life, where another accident happens that leaves one sibling isolated thinking they need to handle everything alone as always. Meanwhile their sibling is going on a journey to fix things and be close with their sibling again. Then that sibling makes an ultimate sacrifice of love, finally showing that all that was needed was the love of their sibling. It is then promptly reversed, and the two siblings are closer than ever.
Also polar opposite vibes. One sibling is perfectionist, other sibling is rambunctious dreamer.
I rest my case.



















