Ordo said:
whitewhiskey said:
Here's an idea starting out during 'Feeling Pinkie Keen'
That flame effect of Twilight's? That wasn't an effect, she actually changed color and burst into flame, and it worried her, so she went through every test she could think of to find the cause, comparing herself to everything she could think of. And when she happens to compare her blood samples to Spike's, well...Let's just say Mrs. Sparkle has some explaining to do when Twilight finds out she's not only Half-Dragon, but Spike's older half-sister!
That flame effect of Twilight's? That wasn't an effect, she actually changed color and burst into flame, and it worried her, so she went through every test she could think of to find the cause, comparing herself to everything she could think of. And when she happens to compare her blood samples to Spike's, well...Let's just say Mrs. Sparkle has some explaining to do when Twilight finds out she's not only Half-Dragon, but Spike's older half-sister!
Or something like that.
I kinda think the idea would probably entail a closer relationship between Spike and Twilight (It could also add a reason to why Twilight was able to hatch Spike), possibly a deteriorating relationship between Twilight's parents (As Twilight's Father, at first, tries to bullshit out a reason like Carrot Cake did when neither of the twins was an Earth Pony). I'd imagine Twilight might look to her friends, Rarity and Applejack especially, for advice because she rreally doesn't know anything about being an older sibling.
The effect on episodes like "The Great Dragon Migration" would be interesting because Twilight's own inquisitive nature would definitely set her to join spike on his quest, something he can't really go against since it's her heritage too. The failure to do so in this episode could also spur them to find their father
Ability-wise, Twilight's abilities could be linked to her form, gaining dragon like abilities when she turns all firey-mode, maybe immunity to fire and such, and her quest to learn how to master that power, possibly with help from both Celestia and Spike.
She might also go through some greed or other emotional problem (Maybe linked to the Lesson Zero episode, explained as happening later in life for her because she's Half-dragon, where it happens worse and earlier to Spike because he's full dragon).
Being a little brother, Spike might also spend even more time with Twilight as they try and connect on a sibling level and both try to find what that means, if there would even have to be a change in their current relationship