Twinkle Pie
Pinkie X Rutherford

The eldest and also a boy! Something everyone gets wrong since he's so small, cute and pink. Twinkle is a fun loving and cute little guy that just wants to have a blast and make some yummy cupcakes! He is often mistaken for a lamb rather than a yak, this is due to his woolly yak coat and pony body type. He was never able to grow a beard and instead grew out his mane and tied it at the front to use as a make shift beard. He really doesn't like it when this is pointed out to him so it's best just to nod and agree that Twinkle has the best beard ever. Also never refuse a cupcake, doing so results in a very sad yak. It should be noted that Twinkle is incredibly protective of Grunnie and won't hesitate to use his cute little hooves to knock someone out.
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Grunnie
Pinkie X Rutherford

Grunnie is a total tomboy with a girly heart. She loves sports and likes racing best of all but there's a soft gentle side to her that only shows itself when she's with her brother; he really encourages her to own that inner princess. Growing up around ponies made her feel like she's just not anywhere near as pretty as other girls, after all she is incredibly large and doesn't have much in the grace department. The beard doesn't help but Twinkle is always there to cheer her up and make her day just a bit better. Some feel intimidated by her large frame and quietness but they should really learn not to judge a book by it's cover as Grunnie is just really shy.
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Cheese Muffin
Pinkie X Cheese

Muffin or Lil' Cheese as her parents call her is the youngest and currently smallest member of the family. Her siblings aren't sure what to do with her as they are very closely bonded and Muffin just doesn't fit in with them due to their age gap. She gets left out by them a lot and instead pals around with the other young foals in Ponyville; namely Velvet Spectrum. They get into trouble together and enjoy exploring places they shouldn't be. Muffin doesn't have her mothers baking skills, in fact she can't cook anything and usually blows up the kitchen when trying.