Silver Streak is a 4ft tall mare Pegasus who wanted to join the wonder bolts but wasn't good enough. She then went into a top secret experiment to creat the first plane pony.

She knows has to wear the collar that allows her to grow and shrink at will. She loves being giant, but has to stay smol for obvious reasons. So she picks 6ft.

She also knows Acid real well, because he keeps checking up on her to make sure his neck hasn't harmed her.