In MLP... Do you ever notice that CarrotTop/GoldenHarvest is "always there".. In every episode you see her at least once. Yet she only has 3 lines in the whole show.

Golden Harvest has been in every episode except:
Friendship is Magic (Part 2), Bridle Gossip, Feeling Pinkie Keen, Sonic Rainboom, Stare Master, A Dog and Pony Show, Party of One, The Return of Harmony (Part 1), May the Best Pet Win!, Secret of My Excess, Baby Cakes, Read It and Weep, Dragon Quest, Hurricane Fluttershy, A Canterlot Wedding (Part 1), The Crystal Empire (Part 2), Wonderbolts Academy, Spike at Your Service, Keep Calm and Flutter On, Castle Mane-ia, Daring Don't, Power Ponies, Bats!, Rarity Takes Manehattan, Pinkie Apple Pie, Twilight Time, Somepony to Watch Over Me, Maud Pie, Testing Testing 1, 2, 3, The Cutie Map (Parts 1+2), Castle Sweet Castle, Appleoosa's Most Wanted, Make New Friends But Keep Discord, The Lost Treasure of Griffonstone, Amending Fences, and Made in Manehattan. Even without being in those episodes, that puts her in 71 appearances as of today. Within those 71 appearances, she has had 4 lines of dialogue. She has been in just under 2/3 of the episodes in the series. Her only film appearance was in Friendship Games. Her frequent background appearances stem from her classification as one of 22 "go-to" background ponies for scenes involving the Mane 6, alongside other such background characters as Derpy, Sweetie Drops, Lyra Heartstrings, and Minuette.

So yes, I've noticed Golden Harvest's frequent background usage.

yeah well there are people like that at my school. there's this one girl that just always seems to be in the background whenever something is going on, walking behind me in the hallway, sitting near us at lunch...
yet she never says a word. I've heard that she's a nice girl, but she kind of creeps me out...