Despite their eggs being laid at the same time, Fire Striker and Scorch were hatched before Pyre , and is therefore quite a bit bigger than she is. They also like to play rough, like most dragon children, and will often wrestle each other, try to dunk each other in the lava or throw each other off cliffs when playing Lord of the hoard.
They always make sure to invite Pyre when she's visiting; Ember has explained to them how Pyre doesn't know many dragons, so they should try to make her feel welcome, and to be patient with her if she doesn't know how to play. Pyre… isn't intimidated by them at all, nope. She just prefers to… be over there. Doing something less scary-looking. Striker and Scorch follow their mom's advice on patience though, and continue to try and include her. Pyre does join them sometimes, but it usually ends up with her crying to Celestia while the two of them sheepishly try to apologise to her.
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I mentioned that Pyre had two older (or, technically, triplet I guess?) biological brothers; well, here they are, Fire Striker (Blue) and Scorch (Green). As mentioned, they're both a bit rough around the edges compared to the foals Pyre is used to. But they are very much sweethearts, as Ember tried her best to raise them to be both strong and kind. She foresees a lot more pony-dragon interactions and cooperation in the future, and thinks it'll help if her children aren't the stereotypical loner dragon who only cares for gathering their hoard.
Striker is the younger of the two by a couple of minutes, but is the more outgoing and verbal of the two. He likes eating gems, sleeping, and rough-housing with his brother. But his favourite pastime is swimming in lava, and you can often find him floating in the lava pools around his home, with only his nose and eyes above the surface. He also likes to fly, and if you can't find him in the lava, he's probably flying loops above the clouds. He got his wings very late, and spend a good four years being very jealous of his brother. Now he prides himself on how fast he can fly and swim, and dreams of one day forming a dragon equivalent of the Wonderbolts.
Scorch is a bit quieter than his brother, and prefers to listen rather than speaking. He also very much enjoy eating gems, sleeping and rough-housing, just like his brother. But, when Striker leaves to go lava-swimming, Scorch looks for one of his favourite dragons; Garble, surprisingly enough. He loves to others speaking, and could spend hours enraptured by Garble's poems. He also likes to spend time with his grampa Torch, listening to stories from long ago when the old behemoth was young. Seeing how much he likes stories, Ember is starting to consider sending him to Twilight's school, where he'd have access to one of the greatest libraries in equestria.
One thing Pyre does want to connect with him about is how he also doesn't quite follow the pony expectations of sex and gender. Whereas she's intersex, and has been her entire life, Scorch is currently trans. Well, he was assigned male at birth, but then he suddenly switched sex upon molting. This isn't very strange for dragons, where intersex individuals make up about one fourth of the population, and sequential hermaphroditism is just a thing that happens to some people. He's not very bothered by it, probably because no-one else is. Pyre would like to talk to him about it and discuss how you know what gender you are (something she's currently a bit unsure about and trying to figure out). But he doesn't really know either, so being the silent type he is, he just shrugs at her. Pyre does not find this very helpful.