I would consider Golden Harvest, Derpy, Heartstrings, Bon-Bon, Minuette, and Berry Punch to be background characters.
Ah, Derpy Hooves. I’ve wondered about that light yellow-maned, cross-eyed gray pegasus, and even now, I’m not quite certain what to opine about her. I had to hold my face as she and that other pegasus dropped those heavier items on Twilight during the latter’s attempted observations of “Pinkie Sense”, but otherwise, the level of attention that she and other background ponies have received from the fans I find just about amazing.:
Spike: Here, let me help you. (cranking device to raise Twilight’s bandaged arms)
Twilight: (straining to see through binoculars) Okay. Take this down. Twitchy tail.
Spike: Twitchy tail? (letting crank go in panic) Twitchy tail!!!
Twilight: (feeling arms drop onto bench) Hush, Spike. We can’t let Pinkie know we’re here, remember?
Spike: Something’s gonna fall! Something’s gonna fall!! Run for your lives! (screaming before running off)
Twilight: Ugh, Spike, honestly. You’re overreacti— (feeling flower pot and anvil fall on her, then buried by hay cart and piano)
Maybe the other characters won’t necessarily mind asking for Derpy’s help should they conclude that she really can assist them, but someone like, say, Trixie may present more of a problem than they’d prefer should she return with whatever new showmanship she has in mind, fair or unfair.