The mean mares Shadow Striker, Slipstream, and Shatter. They're well experienced, leaders, and brutal. Shadow Striker being scarier than the other two and every pony fears her, even Shatter who is an agent/pony hunter. Slipstream shows her respect. But point taken, they're not exactly good guys, and that is something that our heroes learn quickly, one pony is simply scary/cold, one pony is sarcastic and relatively emotionless, and the other is narcissists, deceiving, and seductive to innocent ponies. You don't mess with these guys and yeah, I portray Shatter as a hero pony and shit, or that's what you think, nope, she's not, sorry.

And yes, they're smiling, but anyone can smile, whether they're good or bad people, a smile doesn't indicate who they are.

You may notice that Shadow Striker has no cutie mark, actually she does, in the G5 movie, the ponies have their cutie marks on their right side so their left is blank.

Shadow Striker: Cold hearted, in for revenge after almost dying to a certain Yellow Alicorn. She's terrifying to most ponies, even the innocent civiliains. She says things as it is.

Slipstream: Very authorative, sometimes emotionless, and a very dry sense of humor. Most ponies have trouble reading her.

Shatter: A mass manipulator, narcassist, trickster, and seductive. She lets other ponies do her dirty work if she can help it.